"That's them varmints, cap," said the scout, whose eye was quick to detect the signal. "They're talkin' to each other."

"I know there is somebody where that smoke comes from, but I am not sure that they are hostiles," replied Captain Clinton. "On the contrary, I am of the opinion that the men who built that fire want to talk to me. At any rate, I shall soon know."

As the captain said this he pulled his watch from his pocket with one hand, and with the other produced a note-book, which he held ready for reference. The column was not halted, but the eye of every man in it was fastened upon the distant smoke. When it had ascended to such a height that its top seemed lost in the clouds, it was suddenly cut loose from the ground by some mysterious agency, and floated off into space. A few seconds passed, and then two balloon-shaped clouds arose in quick succession from the same spot, and George took note of the fact that when the last one arose the captain looked at his watch. Another short interval elapsed, and then two more clouds arose, and finally two more; whereupon the captain gave his knee a ringing slap and consulted his note-book.

"I knew I couldn't be mistaken," said he. "That's from Earle, and he is about to communicate with me by courier.—Push ahead now, scout, for he is on a hot trail. Hallo! have you found another?" he added as the scout, instead of obeying the order to "push ahead," suddenly drew up his horse and threw himself from his saddle. "How many have gone off this time?"

"The same number," answered the scout, "an' they were goin' somewhar too, for their ponies were movin' at full jump when they turned off here. They're up to some trick or another, but I can't tell yet what it is."

"Then we must find out, for it is our business to look into these little things. I should like to know where this trail leads to, and I want—Let me see."

The captain turned about and ran his eye over the column, which came to a halt as soon as the commanding officer was seen to stop his horse. He seemed to be in a quandary, out of which he was helped almost immediately by the sight of a soldierly figure upon which his gaze rested for a moment.

"He's the man I want," said the captain aloud.—"Ackerman, will you tell Lieutenant Smith, who is now in command of Earle's troop, that I want to see Corporal Owens?"

"Certainly, sir. May I go with him?" replied George, who knew in a moment that there was something in the wind.

The captain nodded assent, and George galloped back to the column. When he returned Bob Owens rode at his side. The captain was writing—copying something upon a piece of paper from his note-book—but he stopped long enough to return Bob's salute, although he did not say anything to him. Seeing that the officer's horse was growing restive at the delay, and that by his constant pawing and tossing of his head he disturbed his rider, who did his writing while seated in the saddle, Bob dismounted and took the animal by the bridle, and the troopers who remained in column seized the opportunity to fill and light their pipes.