CHAPTER XI.

GAMES, RIDDLES, AND PROBLEMS.

Lewis Carroll had a mind which never rested in waking hours, and as is the case with all such active thinkers, his hours of sleeping were often broken by long stretches of wakefulness, during which time the thinking machinery set itself in motion and spun out problems and riddles and odd games and puzzles.

"Puzzles and problems of all sorts were a delight to Mr. Dodgson," writes Miss Beatrice Hatch in the _Strand Magazine_. "Many a sleepless night was occupied by what he called a 'pillow problem'; in fact his mathematical mind seemed always at work on something of the kind, and he loved to discuss and argue a point connected with his logic, if he could but find a willing listener. Sometimes, while paying an afternoon call, he would borrow scraps of paper and leave neat little diagrams or word puzzles to be worked out by his friends."

Logic was a study of which he was very fond. After he gave up in 1881 the lectureship of mathematics which he had held for twenty-five years he determined to make literature a profession; to devote part of his time to more serious study, and a fair portion to the equally fascinating work for children.

"In his estimation," says Miss Hatch, "logic was a most important study for every one; no pains were spared to make it clear and interesting to those who would consent to learn of him, either in a class that he begged to be allowed to hold in a school or college, or to a single individual girl who showed the smallest inclination to profit by his instructions."

He took the greatest delight in his subject and wisely argued that all girls should learn, not only to reason, but to reason properly--that is, logically. With this end in view he wrote for their use a little book which he called "The Game of Logic," and the girls, whose footsteps he had guided in childish days through realms of nonsense, were willing in many instances to journey with him into the byways of learning, feeling sure he would not lead them into depths where they could not follow. The little volume contains four chapters, and the whimsical headings show us at once that Lewis Carroll was the author, and not Charles Lutwidge Dodgson.