Tommy and Tuppence Beresford mysteries

Investigating the case of a woman who has been missing for five years, Tommy and Tuppence Beresford uncover just enough information to solve the mystery and put their own lives in jeopardy.

"When the Beresford obtain an old house and its contents, Tuppence discovers a series of underlinings in a copy of The Black Arrow. When she writes down the letters, they spell out a very disturbing message: "Mary Jordan did not die naturally." After sixty years, Mary Jordan's enemies are still ready to kill"--