four o'clock
At the same time Frank deemed it necessary that he and his cousin keep watch . And Andy was perfectly willing to sacrifice some of his personal comfort for the sake of insuring the safety of the precious aeroplane . It proved just as well that they had so determined . During Frank 's second term on guard and somewhere around four o'clock , while darkness covered the land , he thought he caught a glimpse of a shadow crossing the deck , headed in the direction of the lazerette . He had been lazily reclining on a soft cushion made of several blankets and looking up at the silvery stars , but immediately he became fully aroused . This might mean danger in some shape toward the aeroplane . And no matter , it behooved him to investigate .