I sprang to my feet and pursued him, shouting as I ran, throwing rocks and attempting to scare him off. Losing track of both pursuer and pursued, I stopped for breath. Suddenly, from almost beneath my feet, the agile villain reappeared, staring at me with bright, bold eyes, advancing toward me as though to attack. He was no coward; with amazing agility he dodged a rock I threw at him, turning a back-spring and landing at my feet. For a moment we glared at each other, then he made off as though utterly unconscious of my presence. I watched the long slender body disappear among the rocks in the opposite direction to that taken by the cony, standing for a moment to regain my breath and recover from my surprise. Suddenly there was a shrill whistle behind me. I jumped and whirled about. Twenty feet away a marmot stood erect atop a rock, eying me inquiringly, watching every movement. He had whistled his signal about me, whether good or bad news I could not detect, but from the distance came other whistles in reply. He was the cony's ally, broadcasting information about the skirmish taking place before his eyes; but whether he was attempting to interfere and divert my attention, I could not make out. Certainly, though, he was giving information, signaling my presence to all within hearing. My intrusion upon the heights in summer has ever been announced by the conies and the marmots. From another direction came a second whistle; apparently I was surrounded. Then, as I moved, the second marmot hurried away from his observation post. He was short-legged, reddish-yellow in color, with a bushy tail, and he ran with great effort but with very little speed, like a fat boy in a foot race. Down in the valley near the ranch were numerous grouse, old and young, so tame that it was like knocking over pet chickens to kill them. But there was a strange bird above timberline, the ptarmigan, the arctic quail of the north--fool hens, the Parson told me. These birds were mottled in color, matching the rocks among which they lived, and so closely did their color blend with their environment it was impossible to distinguish bird from rock so long as the fowl remained still. It was because they depended so utterly upon their protective coloration, making no effort to get out of the way but acting with utmost stupidity, that they came to be called "fool hens." The days I spent above timberline were the most wonderful of all. From high above the world I could see tier upon tier of distant, snow-capped mountains--ghost ranges--and southward, at the horizon, loomed Pike's Peak a hundred airline miles away, a giant pyramid above the foothills, standing sentinel over the vast, flat plains that reached to its foot.