ten o'clock
`` Imagine him not telling us that he had written a book . He 's got his typewriter with him , I wonder if he is planning another book . '' `` Let 's go and ask him , '' announced Bet , jumping up and starting toward the door . `` It 's ten o'clock ! He 'll be sound asleep , '' said Shirley . `` Do n't you think you can wait until morning ? '' Bet had waited and then asked the old man , but she got little satisfaction .