six o'clock
But they spoke with such little precaution , that I could not help overhearing what they said ; and what do you think Ludovico is up to now ? '' `` How should I know ! '' said the Marchese , with the tips of his pale lips ; for he was grinding his teeth together to prevent them from chattering in his head . `` He is off at six o'clock to-morrow morning tete-a-tete with La Bianca , on an excursion to the Pineta . Coming it strong , is n't it ? '' `` To-morrow morning ! '' said the Marchese under his breath , and with difficulty ; for his blood seemed suddenly to rush back cold to his heart , and he was shivering all over .