six in the morning
He said he expected to come to the end of the journey in about three days more , provided no accidents occurred , and there were no storms to delay the _ Monarch _ . `` I think we will divide the night into four watches , '' he said . `` Washington , Jack , Mark and I will take them in turn . During the day we will all be on duty , but from six in the morning to six at night we will stand watch and watch . '' It was arranged that Jack should take the first period , the professor the second , Mark the third and Washington the fourth . As the first watch had passed Jack was excused and the inventor said he would take charge of the ship . Then , as every one was tired from the happenings of the day , they all went to bed , excepting Amos Henderson , who entered the tower to steer the ship .