ten o'clock
`` It will be easy enough to slip out when everybody is asleep , '' Lucia replied to Rebecca 's question . `` We can meet at Mr. Foster 's shop . If I get there first I will wait , and if you get there before me you must wait . As near ten o'clock as we can . And then it wo n't take us but a few minutes to push the sapling out into the current . Just think , Rebby , we will save the town , and nobody will ever know it but just us two . '' Rebby sighed .