“His manner as he led the way along the passage convinced Lord Peter of two things–first, that, gruesome as his exhibit was, he rejoiced in the importance it reflected upon himself and his flat, and secondly, that Inspector Sugg had forbidden him to exhibit it to anyone. The latter supposition was confirmed by the action of Mr. Thipps, who stopped to fetch the doorkey from his bedroom, saying that police had the other, but that he made it a rule to have two keys to every door, in case of accident” (Sayers 10).
Notes: Lord Peter is an observer and good analyzer. The little details matter since they may be key to answering some questions. Lord Peter’s assumptions are often correct.
Sayers, D. Whose body?. FeedBooks. http://www.feedbooks.com/book/3406/whose-body