Always the course in new territory is {28} according to the slope of the ground. River-bank is followed where possible; but where windfall or precipice drives back from the bed of the river over the mountain spurs, the pathfinder takes his bearings from countless signs. Moss is on the north side of tree-trunks. A steep slope compels a zigzag, corkscrew ascent, but the slope of the ground guides the climber as to the way to go; for slope means valley; and in valleys are streams; and in the stream is the 'float,' which is to the prospector the one shining signal to be followed. Timber-line is passed till the forests below look like dank banks of moss. Cloud-line is passed till the clouds lie underneath in grey lakes and pools. A 'fool hen' or mountain grouse comes out and bobbles her head at the passing packtrain. A whistling marmot pops up from the rocks and pierces the stillness. Redwings and waxbills pick crumbs from every camp meal; and occasionally a bald-headed eagle utters a lonely raucous cry from solitary perch of dead branch or high rock. [Illustration: In the Rocky Mountains. From a photograph.] Naturally enough, the pack-train unconsciously follows the game-trail of deer and goat and cougar and bear across the slope to the watering-places where springs gush out from the rocks. One has only to look close enough {29} to see the little cleft footprint of the deer round these springs. To the miners, penetrating the wilds north of the Fraser, the caribou proved a godsend during that lean first winter. The miners spelled it 'cariboo,' and thus gave the great gold area its name.