6Chapter 5Somebody Telephones Kenneth Carlisle
16Chapter 15The Mortlakes and Their Theory
7Chapter 6The Door Behind the Tapestry
17Chapter 16When Polly Wept
8Chapter 7The Dent in the Telephone Book
18Chapter 17They Don’t Like Egbert Warren
9Chapter 8Claude Comes Home
19Chapter 18Kenneth Carlisle Explains in Full
10Chapter 9But The Clue Was Right There