As he rose higher, hanging suspended like a spider from the end of his gossamer thread between the sky and the ground, a sudden thought struck Blinky. It would be manifestly impossible to haul Tubby over the edge of the ledge which projected like the eaves of a roof. Hardly had the thought flashed across his mind before a shout of alarm came from the boys, simultaneously with a sharp: Crack! "The rope!" came a wild yell from the tree. "It's broken!" Blinky went white, and his knees shook. At the same instant the rope began to snake hissingly over the edge of the precipice. It had parted. Tubby was once more dropping downward like a stone. "Catch it!" roared Blinky, regardless of his own peril, throwing himself onto the fast-retreating rawhide. He gripped it, but was carried like a feather before the wind toward the edge of the cliff by the descending Tubby's weight. In another moment--for he obstinately refused to let go--he would have been over the edge, when the line suddenly tightened. "Hooray! I've got it." The shout came in Merritt's voice. The boy, with great presence of mind, had managed to catch the rope, and secure it before its end whipped round the trunk of the tree. As the knot which had parted was in the section of the rawhide above the tree, this was possible. Had the rope broken between the tree and the cliff both Tubby and Blinky would have been dashed to death. "What parted?" roared Blinky, as soon as he had recovered his senses. "One of the knots. It slipped. It's all right, now we've fixed it!" hailed Merritt back. "Merritt, you're all right," shouted the cow-puncher, "if it hadn't been for you, I'd have been down among the cattle now. I'd have traveled by lightening express, too." As it was dark, the boys had not been able to see what the cow-puncher had done, so it was not till long afterward that they found out the meaning of his remark and learned of his courageous action. The cow-puncher feared that the sudden drop and the danger of the rope breaking again under the renewed strain might have frightened Tubby into a swoon. To his intense joy, however, in reply to his hail there came up a cheerful: "Say, what are you fellows doing? Having a game up there? You almost jolted the daylights out of me." "All right, we'll be more careful in future, Tubby," breathed the puncher, not daring to tell the boy what had actually happened. "Are you near the ledge, Tubby?" hailed the puncher suddenly, after an interval of hauling. "Yes, I think so. I can see a dark thing like a shelf right above me." "Stop!" shouted the cow-puncher to the rope handlers.