midnight
`` The heels of your boots make tracks an Indian might almost follow in the dark . You had better throw them into the next clump of bushes you come to ; we can get another pair at the mission . '' In the course of the day they crossed two other streams , and at each of them took measures as before to throw the Indians off their track . They kept on till nightfall , and then Stephen and Pita lay down , Hurka saying that he would watch until midnight . `` You do n't think the Indians will follow at night ? '' Stephen asked . `` There is no fear of that , señor .