Another fact gave basis for vague hope: a scrutiny of the whole horizon showed no answering signal. When Indians resort to such telegraphy, as they often do on the plains and among the mountains, there are calls and replies. It is on record that on one occasion the news of the signing of an important treaty at Washington affecting the Sioux was known to that tribe before the telegraphic messages could reach the army officers at the reservation. It was carried westward by Indian telegraphy which none of us fully understands, except that it seems to be through signal fires from elevated positions. But in that case, there must have been smoke or blaze visible at different points, as we know was really the case.