Travellers Unhorsed--Pedestrian Preparations--Prying Spies. --Bonfires of Baggage--A March on Foot.--Rafting a River--The Wounded Elk.--Indian Trails.--Willful Conduct of Mr. M'Lellan.--Grand Prospect From a Mountain.--Distant Craters of Volcanoes--Illness of Mr. Crooks. FEW reverses in this changeful world are more complete and disheartening than that of a traveller, suddenly unhorsed, in the midst of the wilderness. Our unfortunate travellers contemplated their situation, for a time, in perfect dismay. A long journey over rugged mountains and immeasurable plains lay before them, which they must painfully perform on foot, and everything necessary for subsistence or defense must be carried on their shoulders. Their dismay, however, was but transient, and they immediately set to work, with

