The ladder raisers were protected in their work by the incessant shooting of the other members of the band. From a crescent of positions well out in the valley the riflemen poured a cross-fire of bullets into all the openings of the cliff house. The Indian at the nearest end of the crescent lay not more than a hundred yards beyond the far side of the reservoir.

Even as Lennon grasped the plan of attack, the heavy-butted ladder came to an upright position directly under the main doorway of the cliff house. On the instant a pair of nimble Apaches scrambled to the top, dragging with them a shorter ladder. They hoisted it above them and spliced its foot to the head of the main one.

No less swiftly, another ladder was passed up and lashed to the top of the second. The new top reached within two yards of the brink of the forty-foot cliff. A third Apache started to carry up a short ladder. After he passed the middle of the ascent, his weight, added to that of the men above, made the much-spliced main ladder bow and sway.

One of the upper men crawled through the rungs to wedge himself between the top and the cliff. The third man handed up the short ladder and began to creep down again. The second topman gingerly hoisted the last link in the shaky line of ascent.

The Apaches lying out from the cliff concentrated their fire on the opening above the ladder. For any one in the cliff house to have ventured into the doorway would have meant certain death.

Protected by the storm of bullets, the topmost Apache held up the last ladder while his mate against the cliff spliced it fast. The top rung stood level with the sill of the doorway.

The third man had stopped his descent ten or fifteen feet below. As soon as the splicing was secure, the first man drew something from the belt of his breech-clout and started up the last rungs.

Lennon could restrain himself no longer. He thrust his rifle forward to take aim. From beside him a big hairy red hand reached out to clutch the barrel. Slade's deep voice growled a command:

"Wait! If they ain't got Carmena a'ready——"

"But if once he gets in!" cried Lennon. "He must have a revolver!"