Still the flashes came and went persistently, till Gus exclaimed: "That chap's in trouble, that's what's the matter with him! Most likely he's hurt himself or something or other." "Go on!" Hazard scouted. Gus got out the shotgun and fired both barrels three times in rapid succession. A perfect flutter of flashes came back before the echoes had ceased their antics. So unmistakable was the message that even doubting Hazard was convinced that the man who had forestalled them stood in some grave danger. "Quick, Gus," he cried, "and pack! I'll see to the horses. Our trip hasn't come to nothing, after all. We've got to go right up Half Dome and rescue him. Where's the map? How do we get to the Saddle?" "'Taking the horse-trail below the Vernal Falls,'" Gus read from the guide-book, "'one mile of brisk traveling brings the tourist to the world-famed Nevada Fall. Close by, rising up in all its pomp and glory, the Cap of Liberty stands guard----" "Skip all that!" Hazard impatiently interrupted. "The trail's what we want." "Oh, here it is! 'Following the trail up the side of the fall will bring you to the forks. The left one leads to Little Yosemite Valley, Cloud's Rest, and other points.'" "Hold on; that'll do! I've got it on the map now," again interrupted Hazard. "From the Cloud's Rest trail a dotted line leads off to Half Dome. That shows the trail's abandoned. We'll have to look sharp to find it. It's a day's journey." "And to think of all that traveling, when right here we're at the bottom of the Dome!" Gus complained, staring up wistfully at the goal. "That's because this is Yosemite, and all the more reason for us to hurry. Come on! Be lively, now!" Well used as they were to trail life, but few minutes sufficed to see the camp equipage on the backs of the packhorses and the boys in the saddle. In the late twilight of that evening they hobbled their animals in a tiny mountain meadow, and cooked coffee and bacon for themselves at the very base of the Saddle. Here, also, before they turned into their blankets, they found the camp of the unlucky stranger who was destined to spend the night on the naked roof of the Dome. Dawn was brightening into day when the panting lads threw themselves down at the summit of the Saddle and began taking off their shoes. Looking down from the great height, they seemed perched upon the ridgepole of the world, and even the snow-crowned Sierra peaks seemed beneath them. Directly below, on the one hand, lay Little Yosemite Valley, half a mile deep; on the other hand, Big Yosemite, a mile. Already the sun's rays were striking about the adventurers, but the darkness of night still shrouded the two great gulfs into which they peered. And above them, bathed in the full day, rose only the majestic curve of the Dome. "What's that for?" Gus asked, pointing to a leather-shielded flask which Hazard was securely fastening in his shirt pocket.