three o'clock
`` With your permission , I should like to smoke , '' said he . `` I can follow my thought better . '' `` By all means , '' accorded the lady . Darrow lighted his cigarette , puffed a moment , and continued : `` For instance , at three o'clock he threatens to send a ` sign ' unless McCarthy leaves town by six . McCarthy does not leave town . Promptly at six the ` sign ' comes . What do you make of it ? ''