There was no singing or laughter in the camp that night, for each man carried to his tent with him the reflection that the morrow might see him as dead as the Indian child they were going to avenge. There were plenty of men to act as guards for the night now that the machine was not working, so Charley retired early to his tent and soon fell asleep. At daybreak the guards awoke him and his companions as they had been ordered to do, and reported that the night had passed off without alarms. Chris soon had breakfast ready and over cups of strong steaming coffee their plans for the expedition were made. When the sun arose ten Spaniards and seven Americans armed with guns and pistols filed out of the little camp and silently tramped away for where a distant smudge of smoke showed the location of the gunmen's campfire. Only enough more remained behind to guard the camp. The little party of avengers advanced with caution. They marched in a twisting line so as to always keep a hummock or a bunch of spruces between them and the distant camp smoke so that their approach would not be noticed. As they slowly drew nearer double caution was observed, but at last they came upon an open stretch of prairie which they must cross to reach the thicket in which the gunmen's camp was located. "Here is where they take the alarm," commented Charley, as they emerged out upon the open prairie. But the little party crossed the open stretch without any sign of life from the gunmen. "They have either moved or are sound asleep," he said. "Get your guns ready. Don't fire unless I give the word. Follow me, and make as little noise as you can." The little party filed into the thicket, the chums and engineers in the lead and the Spaniards following close behind. At the edge of the cleared camping place the little party halted in horrified amazement. They had come to avenge the killing of the Indian lad, but another avenger had come before them. Sprawled upon the ground in all manner of attitudes, lay eighteen men--all dead. "Lord!" breathed McCarty softly. "Who could have done it?" "There is only one answer to that question," said Charley gravely. "Those whose right it was to do it, if the taking of human life is ever right. Look at those heads." The others shuddered with horror as they gazed upon the reddened skulls from which the scalp locks had been skillfully removed. Aside from that nothing had been touched, guns still lay where they had fallen and tents and supplies were undisturbed. "The Seminoles," exclaimed Walter, and his chum nodded assent. Two men were sent back to the camp for shovels, and when they returned graves were dug in the sandy soil and the dead men laid to rest. A search of their clothing and belongings gave little clew to the strange men's identity, but from the quantity of tablets and powders found upon them, and their dissipated appearance, the boys decided that they were members of that deadly drug-crazed band of New York gunmen.