The Ivory Dagger (Miss Silver Series)

Bill Waring is collecting his wits in hospital after a train crash when he discovers that Lady Dryden, has pressured his fiancée Lila into an engagement with Herbert Whitall. Whitall is aggressive, with a cold-hearted possessiveness that expands past the bounds of the ivory collection he can't bear to lose. His employees hate him, Lila is terrified of him and it appears that he even has a hold on Lady Dryden. When a dagger in Whitall's collection becomes the instrument of his own death, there are many suspects. Miss Maud Silver must see that justice is done, not merely to punish the guilty, but to protect the innocent.