about four o'clock
Down Lake Carlopa speeded the ARROW , those on board watching the banks slip past as the motor-boat rapidly cut through the water . `` What time do you think we ought to reach home , Tom ? '' asked Mr. Swift . `` Oh , about four o'clock , if we do n't stop for lunch . '' `` Then we 'll not stop , '' decided the inventor . `` We 'll eat what we have on board . I suppose you have some rations ? ''