He turned away from the cliff, but Robert remained, and presently the youth called in a sharp thrilling whisper: "Dave! Dave! Come back!" Robert had continued to watch the sky and he thought he saw a faint dark line against the sea of blue.

He rubbed his eyes, fearing it was a fault of vision, but the trace was still there, and he believed it to be smoke.
"Dave! Dave! The signal! Look! Look!" he cried.
The hunter came to the edge of the cliff and stared into the west.

A thread of black lay across the blue, and his heart leaped.
"Do you believe that Tayoga has anything to do with it ?" asked Robert.
"I do.

If it were our foes out there he'd have been back long since." "And since it may be friends they've sent up this smoke, hoping we'll divine what they mean." "It looks like it.

Tayoga is a sharp lad, and he'll want to put heart in the soldiers.