about one o'clock
He went to bed in a state of the most absurd and causeless mental disturbance . He did not know what to do . Whereas it was enormously obvious what to do . He woke up about one o'clock , and reflected , with an air of discovery : `` Her tone was extremely friendly when she told me it was her birthday to-morrow . She meant it as an advance . I shall take it as an advance . '' About half-past one he said to himself : `` I 'll give her a guinea to spend as she likes . ''