three o'clock
`` No ; I think it must have been between five and six o'clock . '' `` It is wrong for the commissioner to suspect Monsieur Florentin , '' cried the concierge . `` He is a good young man , incapable of harming a fly . And then , there is a good reason why death could not have taken place between three o'clock and half-past ; it is that Monsieur Caffie 's lamp was lighted , and you know the poor gentleman was not a man to light his lamp in broad daylight , looking as he was -- '' She stopped abruptly , striking her forehead with her hand . `` That is what I remember , and you will see that Monsieur Florentin has nothing to do with this affair . As I went upstairs at a quarter past five to light my gas , some one came behind me and rang Monsieur Caffie 's bell , and rapped three or four times at equal distances , which is the signal to open the door . '' Again Saniel 's pen stopped , and he was obliged to lean his hand on the table to prevent its trembling .