midnight
And do n't you remember how , when the boa constrictor killed one of their zebras , little Fritz asked pathetically if boas were good to eat ? '' They laughed over their supper , and then having made sure that they were out of reach of the tide , and the fire would keep , and the rifle was close at Adam 's elbow , they spread their blankets and said `` good night . '' It had been an exciting day . It was past midnight , and the moon was waning when Adam was wakened by Lassie 's cold muzzle against his face . He sat up and called to Robin . There was no answer , and her blankets lay tossed on the other side of the fire . He started up and listened .