While scanning the distant ridge, Jack detected a black brush of vapor climbing slowly above the trees. It broke clean off, and as it went on upward, was inclosed by clear air on all sides. But it was not long before a second, third, fourth, and fifth appeared. Parties were answering the signal of the chief in precisely the same manner that he made it. The only difference was in the number, of which there were only the five. Those, however, were sufficient, as the parties making it were well aware.