ten o’clock
That same day Janzen and Bache came to spend the evening with Guillaume . Once a week they now met at Montmartre , as they had formerly done at Neuilly . Pierre , on these occasions , went home very late , for as soon as Mere-Grand , Marie , and Guillaume 's sons had retired for the night , there were endless chats in the workroom , whence Paris could be seen spangled with thousands of gas lights . Another visitor at these times was Theophile Morin , but he did not arrive before ten o'clock , as he was detained by the work of correcting his pupils ' exercises or some other wearisome labour pertaining to his profession . As soon as Guillaume had told the others of the Princess 's visit that afternoon , Janzen hastily exclaimed : `` But she 's mad , you know . When I first met her I thought for a moment that I might perhaps utilise her for the cause . She seemed so thoroughly convinced and bold !