Exasperating as the cayuse can be on many occasions, no one who has any sense of humour or any appreciation of animal intelligence can fail in time to grow very fond of a horse that has been his companion on many wild mountain trails, that has carried him safely through raging torrents, and sometimes shared his meal beside the camp fire. A good pony will follow unerringly a trail that is indistinguishable to even an experienced guide; he will carry an able-bodied man, or a much heavier pack, all day over a trail that would kill an eastern horse; he will pick his way through a tangle of fallen timber with an instinct that is almost uncanny; and he will do all this on the uncertain feed of mountain camps. He is a true philosopher, a creature of shrewd common sense, pluck, endurance, and rare humour, a good fellow, and a rare friend. Green made the first attempt to scale Mount Sir Donald, the splendid peak that almost overshadows Glacier House. He selected what proved to be an impracticable route, and was forced to return without reaching the summit. The mountain has since been repeatedly climbed, and is now with Mount Stephen in the Rockies the most popular peak for mountain-climbers in the Canadian parks. Thanks to the Swiss guides who are stationed here throughout the season, any one of reasonable endurance and with a head for dizzy heights or depths, can now make his way to the summit of Sir Donald, 10,808 feet above the sea, and be rewarded with a view that will more than compensate him for the fatigue. Although mountain-climbing in the Canadian Rockies has been singularly free from accidents, there have of course occasionally been narrow escapes, and one of these is graphically described in _Among the Selkirk Glaciers_. Green and a companion had climbed to the summit of Mount Bonney, a great peak some miles west of Sir Donald, and were returning, when they made the usual mistake of trying a short cut to avoid a tedious piece of climbing. There seemed to be a way down a very steep snow slope, and Green went ahead on the rope to test it, while his companion anchored himself as firmly as possible in the snow above. They were of course "roped" in the usual mountaineering fashion. "I turned my face to the slope," says Green, "and holding on to the rope kicked my toes in and went over the brink. I took the precaution, too, of burying my axe up to its head at every step. Just below the brink there was a projecting crag. This I thought would give a firm footing before testing the snow slope. I got one foot on to it and was taking it as gently as possible when the rock gave way, a large piece of snow went with it and fell on the slope twenty feet below.