one o'clock
`` We 've got Goujon , '' he said , gloomily , `` but there 's a difficulty . He 's got two friends who can swear an _ alibi _ . Rameau was seen alive at half-past one on Saturday , and the girl found him dead about three . Now , Goujon 's two friends , it seems , were with him from one o'clock till four in the afternoon , with the exception of five minutes when the girl saw him , and then he left them to take a key or something to the housekeeper before finally leaving . They were waiting on the landing below when Goujon spoke to the housemaid , heard him speaking , and had seen him go all the way up to the housekeeper 's room and back , as they looked up the wide well of the staircase . They are men employed near the place , and seem to have good characters . But perhaps we shall find something unfavorable about them .