"In Captain Lewis and Clarke's Travels to the Source of the Missouri," it is mentioned that "the beavers who have not been invaded here by the furrier are continually altering the course of the river. They dam up the small channels of about twenty yards between the islands; when they have effected this, their pond ere long becomes filled with mud and sand; they then remove to another; this is in like manner filled up; and thus the river, having its course obstructed, spreads on all sides, and cuts the projecting points of lands into islands."--_Quarterly Review_, vol. xii., p. 346. Weld mentions, in 1796, that "the indiscriminate slaughter of beavers had so much diminished their numbers that an annual deficiency of 15,000 beaver skins had for some years been observed in the number brought to Montreal."--P. 551. "One day a gentleman, long resident in this country, espied five young beavers sporting in the water, leaping upon the trunk of a tree, pushing one another off, and playing a thousand interesting tricks. He approached softly, under cover of the bushes, and prepared to fire on the unsuspecting creatures; but a nearer approach discovered to him such a similitude between their gestures and the infantile caresses of his own children that he threw aside his gun."--Franklin's _Journey to the Polar Sea_, p. 91. "The proprietor of one of the large quarries of gypsum on the Shubenacadie showed me some wooden stakes, dug up a few days before by one of his laborers from a considerable depth in a peat bog. His men were persuaded that they were artificially cut by a tool, and were the relics of aboriginal Indians; but, having been a trapper of beavers in his younger days, he knew well that they owed their shape to the teeth of these creatures. We meet with the skulls and bones of beavers in the fens of Cambridgeshire, and elsewhere in England. May not some of the old tales of artificially cut wood, occurring at great depths in peats and morasses, which have puzzled many a learned antiquary, admit of the like explanation?"--Lyell's _Travels in America_, vol. ii., p. 229. No. XXXIX.