midnight
It could not be the latter that were disturbing them . Who then ? On the third night after his trade with the Indians , Carlos had retired to rest with his people . Antonio kept watch until midnight , at which hour he was to be relieved by one of the peons . Antonio had grown very sleepy . His hard riding after the buffalo had wearied him ; and he was doing his best to keep awake for the last half-hour of his vigil , when a snort reached his ears from the direction of the _ mulada _ . This brought him to himself .