four o'clock
`` I took the liberty of making those preparations without awaiting such a command , '' said Frank . `` I have thrown out outposts , and there is no danger of a surprise tonight . '' `` You mean this morning , '' disagreed Jack , after a look at his watch . `` It 's after four o'clock now . '' `` Then it will soon be daylight , '' said Frank . `` You had better turn in and get a little sleep . I 'll stand watch . ''