They do not burrow, nor do they bark, but howl; they frequent the woods and plains, and skulk along the skirts of the buffalo herds, in order to attack the weary or wounded." Under date of May 5, the journal has an interesting story of an encounter with a grizzly bear, which, by way of variety, is here called "brown," instead of "white." It is noticeable that the explorers dwelt with much minuteness upon the peculiar characteristics of the grizzly; this is natural enough when we consider that they were the first white men to form an intimate acquaintance with "Ursus horribilis." The account says:-- "Captain Clark and one of the hunters met, this evening, the largest brown bear we have seen.

As they fired he did not attempt to attack, but fled with a most tremendous roar; and such was his extraordinary tenacity of life, that, although he had five balls passed through his lungs, and five other wounds, he swam more than half across the river to a sand-bar, and survived twenty minutes.

He weighed between five and six hundred pounds at least, and measured eight feet seven inches and a half from the nose to the extremity of the hind feet, five feet ten inches and a half round the breast, three feet eleven inches round the neck, one foot eleven inches round the middle of the fore leg, and his claws five on each foot, were four inches and three-eighths in length.

This animal differs from the common black bear in having his claws much longer and more blunt; his tail shorter; his hair of a reddish or bay brown, longer, finer, and more abundant; his liver, lungs, and heart much larger even in proportion to his size, the heart, particularly, being equal to that of a large ox; and his maw ten times larger.

Besides fish and flesh, he feeds on roots and every kind of wild fruit." On May 8 the party discovered the largest and most important of the northern tributaries of the Upper Missouri.