If Dinsmore had been captured by them the chances were that 'Mona had been taken, too, unless he had given her the horse and remained to hold the savages back.
Roberts galloped wildly along the edge of the rift. Once again he heard that long-drawn wail of anguish and pulled up his horse to listen, the while he shook like a man with a heavy chill.
Before the sound of it had died away a shot echoed up the cañon to him. His heart seemed to give an answering lift of relief. Some one was still holding the Apaches at bay. He fired at once as a message that help was on the way.
His trained ear told him that the rifle had been fired scarcely a hundred yards below him, apparently from some ledge of the cliff well up from the bottom of the gulch. It might have come from the defenders or it might have been a shot fired by an Apache. Jack determined to find out.
He unfastened the tientos of his saddle which held the lariat. A scrub oak jutted up from the edge of the cliff and to this he tied securely one end of the rope. Rifle in hand, he worked over the edge and lowered himself foot by foot. The rope spun round like a thing alive, bumped him against the rock wall, twisted in the other direction, and rubbed his face against the harsh stone. He had no assurance that the lariat would reach to the foot of the cliff, and as he went jerkily down, hand under hand, he knew that at any moment he might come to the end of it and be dashed against the boulders below.
His foot touched loose rubble, and he could see that the face of the precipice was rooted here in a slope that led down steeply to another wall. The ledge was like a roof pitched at an extremely acute angle. He had to get down on hands and knees to keep from sliding to the edge of the second precipice. At every movement he started small avalanches of stone and dirt. He crept forward with the utmost caution, dragging the rifle by his side.
A shot rang out scarcely fifty yards from him, fired from the same ledge upon which he was crawling.
Had that shot been fired by an Apache or by those whom he had come to aid?