nine o'clock
It was impossible for any one to get in , even with a latch-key . Mrs. Drabdump 's evidence -LRB- which , of course , preceded his -RRB- was more important , and occupied a considerable time , unduly eked out by Drabdumpian padding . Thus she not only deposed that Mr. Constant had the toothache , but that it was going to last about a week ; in tragi-comic indifference to the radical cure that had been effected . Her account of the last hours of the deceased tallied with Mortlake 's , only that she feared Mortlake was quarrelling with him over something in the letter that came by the nine o'clock post . Deceased had left the house a little after Mortlake , but had returned before him , and had gone straight to his bedroom . She had not actually seen him come in , having been in the kitchen , but she heard his latch-key , followed by his light step up the stairs . A JURYMAN : How do you know it was not somebody else ?