Four o'clock
`` Yes , '' said the cardinal ; `` I was about to mention it . Where was I ? '' `` Your eminence was at four o'clock , '' replied Pietro . `` Four o'clock already ! '' exclaimed the cardinal , `` and nothing done ; from four to half-past four , interview with the treasurer of the diocese . That 's a bad half-hour , Pietro . At half-past four I wish the barca to be at the landing .