eight o'clock
The return was harder than they had expected . The road seemed to be twice as rough as it had been in the morning ; they were utterly fagged , and discovered that even a load of birch bark can weigh a good deal under certain circumstances . `` Pile it up in the back of the yard , '' Greg suggested , `` and we 'll take it around to Mr. Driggs in the morning . '' `` Then we can hardly get back to Katson 's Hill to-morrow , if we wait until the boatyard opens at eight o'clock , '' said Dave . `` We ought to start for the hill before six , as we did this morning . '' `` We 'll none of us feel like going to Katson 's Hill early to-morrow morning , '' smiled Dick wearily . `` Fellows , I guess we 'll have to put in twice as much time , and go every other day .