It was comparatively early in the evening when Shagbark placed the guards. His plan was that six should act as sentinels until midnight, when, if nothing occurred, they would give place to the same number, and retire to their quarters for the remainder of the night. As for Shagbark, he said he would be on duty until daylight. If when morning came, he found himself in need of sleep, he would lie down for a short time in one of the wagons, but he didn’t expect to feel any drowsiness unless he was robbed of slumber for two or three nights in succession.