about two o'clock in the morning
Try to get all the sleep you can , for we must start early to avoid the heat of the day , '' and there was the sound of the guide leaving and arranging the folds of the mosquito net behind him to keep out the night-flying insects . Once more Ned composed himself to sleep , and this time successfully , for he did not have any more unpleasant dreams . The quiet of the jungle settled down over the camp , at least the comparative quiet of the jungle , for there were always noises of some sort going on , from the fall of some rotten tree limb to the scream or growl of a wild beast , while , now and again , from the river came the pig-like grunts of the alligators . It was about two o'clock in the morning , as they ascertained later , when the whole camp -- white travelers and all -- was suddenly awakened by a wild scream . It seemed to come from one of the natives , who called out a certain word ever and over again . To Tom and Ned it sounded like : `` Oshtoo ! Oshtoo !