three o'clock
It was as though Don Luis found renewed strength in a sudden fit of fear . His weak voice recovered its emphasis , and , by turns imperious , despairing , and beseeching , full of a conviction which he did his utmost to impart to M. Desmalions , he said : `` Go away , Monsieur le Préfet ! Go , all of you ; leave the house . The house will be blown up at three o'clock . Yes , yes , I swear it will . Ten days after the fourth letter means now , because there has been a ten days ' delay in the delivery of the letters . It means now , at three o'clock in the morning .