The traveller going westwards from the prairie finds the way blocked by a grim wall of cliffs rising 7000 or 8000 feet above the sea and justifying the name of the Rockies given to our greatest chain of mountains Toward the end of the summer these desolate precipices are snowless and except for a glimpse of white peaks through some pass there is scarcely a suggestion of the glacier region within Then the train enters the Gap and before long the s...