tion; and, of course, large dips and ravines are consequent upon that meeting. The 'dividing ridge' of a district is that which, while it is, as it were, the back-bone of the range of which it forms a part, heads at the same time all the transverse ravines, whether on the right or on the left hand, and thereby spares to the traveller an infinity of toilsome ascent and descent.
"I have sometimes observed that an Indian trail wound through a country in a course perfectly serpentine, and appeared to me to travel three miles when only one was necessary. It was not till my own practical experience had made me attend more closely to this matter, that I learnt to appreciate its importance. I think that the first quality in a guide through an unknown range of rolling prairie, is having a good and a quick eye for hitting off the 'dividing ridge;' the second, perhaps, in a western wilderness, is a ready and almost intuitive perception (so often found in an Indian) of the general character of a country, so as to be able to bring his party to water when it is very scarce. . .
A few miles farther we crossed an old
