four o'clock
It would render me a great service if I could have her for only an hour to-day . Will you ? '' The Countess hesitated , annoyed , without knowing the reason why . But she replied : `` Very well , my friend ; we shall be with you at four o'clock . '' `` Thank you ! You are goodness itself ! '' He went away to prepare his canvas and study his subject , so that he need not tire his model too much .