ten o'clock
`` Let me think , '' answered Marteau . `` I shall first go east and then west , if I can get around that division ahead yonder . Let us take the road to d'Aumenier . I will meet you at the old château at ten o'clock , or not later than midnight . There is a by-road over the marsh and through the forest by the bank of the river to Sézanne . '' `` I know it . '' `` Very well , then .