Chapter 13

Accustomed all his life to transparent water, he had also been accustomed to find it liquid, and easily parted. Put suddenly face to face with the transparent material which repelled him, what was he to think? Much the same effect would be produced if you or I, having been accustomed, of course, all our lives, to the fluidity of air, which opens for our passage, were opposed by a solid block of transparent atmosphere. Imagine any one running for a train, and striking his head with all his might against such a block. He would rise, shake himself together, and endeavour to pursue his journey, and be again repelled. More than likely he would try three times before he became convinced that it really was something in the air itself which stopped him. Then he would thrust with his stick and feel, more and more astounded every moment, and scarcely able to believe his own senses. During the day, otherwise engaged, he would argue himself into the view that he had made a mistake, and determine to try again, though more cautiously. But so strong is habit that if a cause for alarm arose, and he started running, he might quite probably go with tremendous force up to the solid block of transparent air, to be hurled back as the jack was.

These are no mere suppositions, for quite recently I heard of a case which nearly parallels the conduct of the jack. A messenger was despatched by rail to a shop for certain articles, and was desired to return by a certain time. The parcel was made up, the man took it, heard an engine whistle, turned to run, and in his haste dashed himself right through a plate-glass window into the street. He narrowly escaped decapitation, as the great pieces of glass fell like the knife of a guillotine. Cases of people injuring themselves by walking against plate-glass are by no means uncommon; when the mind is preoccupied it takes much the same place as the plate of glass in the water and the jack. Authorities on mythology state that some Oriental nations had not arrived at the conception of a fluid heaven--of free space; they thought the sky was solid, like a roof. The fish was very much in the same position. The reason why fish swim round and round in tanks, and do not beat themselves against the glass walls, is evidently because they can see where the water ends. A distinction is apparent between it and the air outside; but when the plate of glass was put inside the tank the jack saw water beyond it, or through it. I never see a fish in a tank without remembering this experiment and the long train of reflections it gives rise to. To take a fish from his native brook, and to place him suddenly in the midst of such, to him, inconceivable conditions, is almost like watching the actual creation of mind. His mind has to be created anew to meet it, and that it did ultimately meet the conditions shows that even the fish--the cold-blooded, the narrow-brained--is not confined to the grooves of hereditary knowledge alone, but is capable of wider and novel efforts. I thought the jack came out very well indeed from the trial, and I have mentioned the matter lest some should think I have attributed too much intelligence to fish.

Other creatures besides fish are puzzled by glass. One day I observed a robin trying to get in at the fanlight of a hall door. Repeatedly he struck himself against it, beat it with his wings, and struggled to get through the pane. Possibly there was a spider inside which tempted him; but allowing that temptation, it was remarkable that the robin should so strive in vain. Always about houses, he must have had experience of the properties of glass, and yet forgot it so soon. His ancestors for many generations must have had experience of glass, still it did not prevent him making many trials. The slowness of the jack to learn the impenetrable nature of the glass plate and its position is not the least indication of lack of intelligence. In daily life we constantly see people do things they have observed injure them, and yet, in spite of experience, go and do the same again.

The glass experiment proves to me that the jack, like all other creatures, really has a latent power of intelligence beyond that brought into play by the usual circumstances of existence. Consider the conditions under which the jack exists--the jack we have been approaching so carefully. His limits are the brook, the ponds it feeds, and the ditches that enter it. He can only move a short distance up the stream because there is a high hatch, nor can he go far down because of a mill; if he could, the conditions would be much the same; but, as a matter of fact, the space he has at his command is not much. The running water, the green flags, the lesser fishes, the water-rats, the horses and cattle on the bank--these are about all the things that he is likely to be interested in. Of these only the water, the lesser fishes, the flags, and the bottom or sides of the brook, are actually in his touch and complete understanding. As he is unable to live out of water, the horse on the bank, in whose very shadow he sometimes lies, might be a mile away for aught it concerns him. By no possible means can he discover anything about it. The horse may be itself nothing more than a shadow, unless in a shallow place he steps in and splashes. Night and day he knows, the cool night, and the sunbeams in which he basks; but he has no way of ascertaining the nature of anything outside the water. Centuries spent in such conditions could add but little to his experience.

Does he hear the stream running past him? Do the particles of water, as they brush his sides and fins, cause a sound, as the wind by us? While he lurks beneath a weed in the still pool, suddenly a shoal of roach rush by with a sound like a flock of birds whose wings beat the air. The smooth surface of the still water appears to cover an utter silence, but probably to the fish there are ceaseless sounds. Water-fowl feeding in the weedy corners, whose legs depend down into the water and disturb it; water-rats diving and running along the bottom; water-beetles moving about; eels in the mud; the lower parts of flags and aquatic grasses swinging as the breeze ruffles their tips; the thud, thud of a horse's hoofs, and now and then the more distant roll of a hay-laden waggon. And thunder--how does thunder sound under the surface? It seems reasonable to suppose that fish possess a wide gamut of hearing since their other senses are necessarily somewhat curtailed, and that they are peculiarly sensitive to vibratory movements is certain from the destruction a charge of dynamite causes if exploded under water. Even in the deep sea the discharge of a torpedo will kill thousands of herrings. They are as it were killed by noise. So that there are grounds for thinking that my quiet jack in the pool, under the bank of the brook, is most keenly alive by his sense of hearing to things that are proceeding both out and in the water. More especially, no doubt, of things in the water itself. With all this specialised power of hearing he is still circumscribed and limited to the groove of the brook. The birds fly from field to field, from valley to mountain, and across the sea. Their experience extends to whole countries, and their opportunities are constant. How much more fortunate in this respect than the jack! A small display of intelligence by the fish is equivalent to a large display by the bird.

When the jack has been much disturbed no one can do more than obtain a view of him, however skilfully he may conceal himself. The least sign of further proceedings will send the jack away; sometimes the mere appearance of the human form is sufficient. If less suspicious, the rod with the wire attached--or if you wish to make experiments, the rod without the wire--can be placed in the water, and moved how you choose.

SPORT AND SCIENCE

Kingfisher Corner was the first place I made for when, as a lad, I started from home with my gun. The dew of September lies long on the grass, and by the gateway I often noticed wasps that had spent the night in the bunches, numbed and chilled, crawling up the blades bent into an arch by the weight of the drops. Thence they got on the gate, where, too, the flies congregated at that time in the morning; for while it was still cool at the surface on the ground, the dry wood soon absorbed the heat of the sun. This warmth brought them to life again, and after getting well charged with it, the insects flew off to any apples they could discover. These heavy dews, as the summer declines, keep the grass fresh and green, and maintain the leaves on hedge and tree; yet they do not reach the earth, which remains dry. It is a different dew to the spring dew, or acts in another manner: the spring dews moisten the earth, and from the arable lands as the sun shines forth you may see the vapour rise and drift along the surface, like the smoke of a gun on a damp day. The mottled geometrical giant spiders find their webs thick with this September dew, which seems as if a little unctuous. Stepping through the gateway with the morning sun behind me, I saw at each step a fresh circle of dewdrops gleam, some ruby, some emerald, some brightly white, at the same distance in front. The angle of refraction advanced as I moved; there was a point at which the dewdrop shot back a brilliant ray, and then became invisible, or appeared a mere drop of dull water.

By moonlight there is thus formed a semicircle of light on the grass, which continually moves before you; it is a halo on the grass-tips. I noticed this as a boy, and tried all sorts of experiments respecting it, but never met with any mention of it in books till quite lately, in Benvenuto Cellini's "Autobiography." He says, "There appeared a resplendent light over my head, which has displayed itself conspicuously to all I have thought proper to show it to, but those were very few. This shining light is to be seen in the morning over my shadow till two o'clock in the afternoon, and it appears to the greatest advantage when the grass is moist with dew; it is likewise visible in the evening at sunset. This phenomenon I took notice of in Paris, because the air is exceedingly clear in that climate, so that I could distinguish it there much plainer than in Italy, where mists are much more frequent; but I can still see it even here, and show it to others, though not to the same advantage as in France." Benvenuto thought this one of the most extraordinary things that had happened to him; and records it after a wonderful dream, as if it, too, were supernatural. It is, however, possible that some eyes are so constituted as not to be able to see this phenomenon in their own case; at least, I have sometimes tried in vain to get other people to see it. I should not have noticed it had I not been about at all hours with my gun as a boy. It is much more visible by moonlight, when the rabbits' white tails go dot, dot, lightly over the grass, and you are just as likely to shoot at their shadows as at their bodies. As the scythe of the mower mows a swathe before him, so the semicircle of light moves in front over the dew, and the grass appears another tint, as it does after a roller has passed.

In a scientific publication not long since, a letter was published describing what the writer supposed was indeed something extraordinary. He had seen a fragment of rainbow--a square piece, as it were--by itself in the sky, some distance to one side of the sun. In provincial papers such letters may often be found, and even, until lately, in papers issued in London; now with accurate accounts of an ordinary halo about the sun, now with a description of a prismatic cloud round the moon, and one day some one discovered that there were two currents of air, as the clouds went in two directions. Now, it is clear enough that none of these writers had ever been out with a gun or a rod; I mean out all day, and out in the full sense of the phrase. They had read books of science; from their language they were thoroughly educated, and felt a deep interest in natural phenomena. Yet what a marvel was here made out of the commonest incidents of the sky! Halos about the sun happen continually; the prismatic band or cloud about the moon is common; so is the detached rainbow; as for the two currents of air, the clouds often travel in three directions, occasionally in four. These incidents are no more surprising to a sportsman than the sunset. I saw them, as a boy, almost day by day, and recorded the meteors in the evening. It seems to me that I used to see scores of meteors of various degrees of brightness. Once the path, the woods, the fields, and the distant hills were lit as if with a gigantic electric light; I was so interested in tracing the well-known scene so suddenly made apparent in the darkness that it was not for some seconds I thought of looking for the bolide, but even then I was in time to see it declining just before extinction. Others who have been out with their guns have, of course, seen exactly the same things; I do not mention them to claim for myself any special powers of observation, but as instances of the way in which sport brings one in contact with nature. Other sportsmen, too, must have smiled at the marvel made of such appearances by clever and well-educated, but indoor, people.

This very spring (1883), as I walked about a town in the evening, I used to listen to find if I could hear any one mention the zodiacal light, which, just after sunset, was distinctly visible for a fortnight at a time. It was more than usually distinct, a perfect cone, reaching far up into the sky among the western stars. No one seemed to observe it, though it faced them evening after evening. Here was an instance in the opposite direction--a curious phenomenon, even now rather the subject of hypothesis than of demonstration, entirely overlooked. The common phenomenon made a marvel, and the unexplained phenomenon unnoticed. Both in the eyes of a thoughtful person are equally wonderful; but that point of view is apart from my present object, which is to show that sport trains the eye. As a boy, roving about the hedges with my gun, it was my especial delight to see Mercury, because one of the great astronomers had never seen that planet, and because in all the books it was stated as difficult to see. The planet was favourably situated, and I used to see it constantly after sunset then, pale, and but just outside the sunset glow, only a little way above the distant hills. Now it is curious, to remark in passing, that as the sun sets behind a hill the slope of the hill towards you is often obscured by his light. It appears a luminous misty surface, rosy-tinted, and this luminous mist hides the trees upon it, so that the slope is apparently nothing but a broad sweep of colour; while those hills opposite the sun, even if twice as distant, are so clearly defined that the smallest object is evident upon them. Sometimes, instead of the mist on the western hill, there is a blood-like purple almost startling in its glory of light.

There have been few things I have read of, or studied, which in some manner or other I have not seen illustrated in this country while out in the fields. It is said that in the Far West, on the level prairies, when the snow covers them, you see miles and miles away, a waggon stopping; you hurry on, and in half a day's journey overtake it, to find the skull of an ox--so greatly has distance and the mirage of the snow magnified its apparent size. But a few days since I saw some rooks on the telegraph wires against a bright sky, but as I approached they flew and resolved into starlings, so much had the brilliant light deceived me. A hare sometimes, on the open ground, looks at a distance, in the sunny days of May when hares are often abroad in daylight, as big as a good-sized dog, and, except by the leap and the absence of visible tail, can hardly be told from a dog. The bamboo fishing-rods, if you will glance at the bamboo itself as you fish, seem the most singular of growths. There is no wood in the hedge like it, neither ash, hazel, oak, sapling, nor anything; it is thoroughly foreign, almost unnatural. The hard knots, the hollow stem, the surface glazed so as to resist a cut with a knife and nearly turn the steel--this is a tropical production alone. But while working round the shore presently you come to the sedges, and by the sedges stands a bunch of reeds. A reed is a miniature bamboo, the same shape, the same knots, and glazy surface; and on reference to any intelligent work of botany, it appears that they both belong to the same order of inward-growing Endogens, so that a few moments bestowed on the reed by the waters give a clear idea of the tropical bamboo, and make the singular foreign production home-like and natural.

I found, while I was shooting every day, that the reeds, and ferns, and various growths through which I pushed my way, explained to me the jungles of India, the swamps of Central Africa, and the backwoods of America; all the vegetation of the world. Representatives exist in our own woods, hedges, and fields, or by the shore of inland waters. It was the same with flowers. I think I am scientifically accurate in saying that every known plant has a relative of the same species or genus, growing wild in this country. The very daisy, the commonest of all, contains a volume of botany; so do the heaths, and the harebells that hang so heavily under the weight of the September dew. The horse-tails by the shore carry the imagination further back into the prehistoric world when relations of these plants flourished as trees. The horse-tails by ponds are generally short, about a foot or eighteen inches high, more or less, but in ditches occasionally there are specimens of the giant horse-tail as high as the waistcoat, with a stem as thick as a walking-stick. This is a sapling from which the prehistoric tree can readily be imagined. From our southern woods the wild cat has been banished, but still lives in the north as an English representative of that ferocious feline genus which roams in tropical forests. We still have the deer, both wild and in parks. Then there are the birds, and these, in the same manner as plants, represent the inhabitants of the trackless wilds abroad. Happily the illustration fails mostly in reptiles, which need not be regretted; but even these, in their general outline as it were, are presented.

It has long been one of my fancies that this country is an epitome of the natural world, and that if any one has come really into contact with its productions, and is familiar with them, and what they mean and represent, then he has a knowledge of all that exists on the earth. It holds good even of Australia; for palaeontologists produce fossil remains of marsupials or kangaroos. As for the polar conditions, when going round for snipes I constantly saw these in miniature. The planing action of ice was shown in the ditches, where bridges of ice had been formed; these slipping, with a partial thaw, smoothed the grasses and mars of teazles in the higher part of the slope, and then lower down, as the pressure increased, cut away the earth, exposing the roots of grasses, and sometimes the stores of acorns laid up by mice. Frozen again in the night, the glacier stayed, and crumbling earth, leaves, fibres, acorns, and small dead boughs fell on it. Slipping on as the wind grew warmer, it carried these with it and deposited them fifty yards from where they originated. This is exactly the action of a glacier. The ice-mist was often visible over the frozen water-meadows, where I went for duck, teal, and at intervals a woodcock in the adjacent mounds. But it was better seen in the early evening over a great pond, a mile or more long; where, too, the immense lifting power of water was exemplified, as the merest trickle of a streamlet flowing in by-and-by forced up the thick ice in broad sheets weighing hundreds of tons. Then, too, breathing-holes formed just as they are described in the immense lakes of North America, Lakes Superior or Michigan, and in the ice of the Polar circle. These were never frozen over, and attracted wild-fowl.

In August, when there were a few young ducks about, the pond used to remind me in places of the tropical lakes we heard so much of after the explorers got through the portentous continent, on account of the growth of aquatic weeds, the quantity and extent of which no one would credit who had not seen them. No wonder the explorers could not get through the papyrus-grown rivers and lakes, for a boat could hardly be forced through these. Acres upon acres of weeds covered the place, some coming up from a depth of twelve feet. Some fish are chiefly on the feed in the morning, and any one who has the courage to get up at five will find them ravenous. We often visited the place a little after that hour. A swim was generally the first thing, and I mention a swim because it brings me to the way in which this mere pond illustrated the great ocean which encircles the world. For it is well known that the mighty ocean is belted with currents, the cold water of the Polar seas seeking the warmth of the Equator, and the warm water of the Equator floating--like the Gulf Stream--towards the Pole, floating because (I think I am right) the warm water runs on the surface. The favourite spot for swimming in our pond was in such a position that a copse cast a wide piece of water there into deep shadow all the morning up till ten o'clock at least. At six in the morning this did not matter, all the water was of much the same temperature; having been exposed to the night everywhere, it was cold of course.

But after ten the thing was different; by that time the hot reaper's sun had warmed the surface of the open water on which the rays fell almost from the moment the sun rose. Towards eleven o'clock the difference in temperature was marked; but those who then came to bathe, walking along the shore or rowing, dipped their hands in and found the water warm, and anticipated that it would be equally so at the bathing-place. So it was at the surface, for the warm water had begun to flow in, and the cold water out, rather deeper, setting up, in fact, an exact copy of the current of the ocean, the shadowed part by the copse representing the Polar area. Directly any one began to swim he found the difference, the legs went down into cold water, and in many cases cramp ensued with alarming results and danger. Down to the chest it was warm, quite warm, while the feet were very cold. Not much imagination is needed to conceive the effect on persons not used to rough bathing, and even a strong man might suffer. People insisted that these chills and cramps were caused by cold springs rising at the bottom, and could not be argued out of that belief. As a matter of fact there was not a single spring over the whole extent of the bottom. That part in particular was often dry, not from dry weather, but as the water of the pond was drawn away. Let it rain as much as it would, no spring ever broke up there. The cold currents were produced by the shadow of the copse, and, had the trees been felled, would have disappeared. That would have been like letting the sun of the Equator shine on the Polar seas.