four
o'clock
If we leave at midnight , by five o'clock in the morning we can be ninety miles north . The only trouble is in the handling of the bag . It 's going to take at least twenty men to move the inflated bag from the retaining weights to the car and we ca n't make the rigging fast in the dark . We 'd better begin work at four o'clock to-morrow morning , as soon as it begins to be light , and get away about two in the afternoon . I think we 'll see our friends about seven or just at dark , if we do . '' And so it was arranged . The young aeronauts thus had all afternoon to store provisions , water , gasoline and the instruments .