The *‘‘Mountain of Rocks”’ I21 apprehensive lest they should influence his Indians to desert. It appears that an old Indian at the fort who had been at war beyond the Rocky Mountains had given him an account of a large river that forked between the mountains and had directed him tc take the southern branch, saying that from its headwaters there was a carrying-place of about a day’s march for a young man to get to the other river, that flowed towards the midday sun. His son had accompanied him on that trip, and the old man arranged that his son should accompany the explorer, but another young man, who had been refused a place as hunter for the party, persuaded the son to desert. The instigator of this desertion now appeared and Mackenzie remarks that under any other circumstances he would have chastised the man for seducing away his intended guide. Of the latter no word could be obtained, nor of the old man, who should have been in this neighbourhood. The river banks became lower, and the stream itself widened from three to five hundred yards and was full of islands and flats. During the day the tracks of many grizzlies were seen, and the den of one of them was discovered on an island. It measured ten feet long, five feet high, and six wide. ‘‘The Indians entertained great apprehension of this kind of bear, which is called the grisly bear, and they never venture to attack it but in a party of at least three or four. Our hunters, though they had been much higher than this by land, knew nothing of the river.” At the entrance of a branch it was observed that some of the wood had been cut with an axe, and it was concluded that these tools had not been used by any of the Indians they were acquainted with. Animals were plentiful, and the scenery occasionally reminded them of the magnificent stretch opposite the fort. Mackenzie was much taken with the situation at the mouth of Sinew River, which he