about eleven
o'clock
was the startling reply . `` That accounts for your finding me where you did . My usual post is in the lobby . But about eleven o'clock , when the theater people began to come in I had a hazy sort of impression that someone or something slipped past in the crowd -- something that had no business in the hotel . '' We got out of the lift . `` I do n't quite follow you , '' said Smith . `` If you thought you saw something entering , you must have formed a more or less definite impression regarding it . ''