volume xxii).--ED.

[24] For a description of this disaster, which was occasioned by a severe windstorm, see Montana Historical Society _Contributions_, iii, pp. 204, 205; two employés and one Indian were drowned. Mitchell sent an express to Fort Union with news of the catastrophe, meanwhile fortifying within a small barricade. Aid was sent, and the party enabled to proceed.--ED.

[25] See Plate 17, in the accompanying atlas, our volume xxv.--ED.

[26] Milk River was named by Lewis and Clark from the peculiar color of its waters, "being about the color of a cup of tea with the admixture of a tablespoonful of milk"--_Original Journals of the Lewis and Clark Expedition_, ii, p. 10. It is by far the largest of the northern tributaries of the Missouri, rising in the main range of the Rockies in north-west Montana, and flowing in a generally eastern course on both sides of the international boundary line--the 49th parallel. The stream drains the territory between the Saskatchewan and the Missouri, and its valley is for many miles followed by the Great Northern Railway.--ED.

[27] Big Dry River, which retains the name assigned it by Lewis and Clark, is the largest southern tributary of the Missouri between the Yellowstone and the Musselshell. It is, as described by Maximilian, a vast coulée, stretching to the Yellowstone watershed. When Lewis and Clark passed (May 9, 1805), there was no running water within it, although the bed was as wide at this point as that of the Missouri.--ED.

[28] This creek is on the larboard (south) bank of the river, and was charted by Lewis and Clark; but it has not been identified, for the reason that this region has not yet been topographically studied.--ED.

[29] See Plate 68, figure 15, in the accompanying atlas, our volume XXV.--ED.

[30] See Plate 68, figures 16, 18, in the accompanying atlas, our