6An Expert Opinion
25Reveals the Death Trap
7What Was Written in the Vellum Book
26In Which Ben Knutton Grows Confidential
8The Seven Dead Men
27Dorothy Drummond Prefers Secrecy
9One Point Is Made Clear
28We Receive Midnight Visitors
10The Guardian of the Secret
29Dorothy Makes a Confession
11Forestalled
30The Silent Man's Story
12Job Seal Makes a Proposal
31The House at Kilburn
13A Call, and Its Consequence
32What We Discovered at the Record Office
14Requires Explanation
33We Decipher the Parchment
15Reveals Something of Importance
34Our Search at Tickencote and Its Results
16Mrs. Graham's Visitor
35The Spy, and What He Told Us
17The Seller of the Secret
36"Nine Points of the Law"
18The Silent Man's Warning
37Contains the Conclusions
19The Lady from Bayswater
