Fiedler’s Investigation
The Spy Who Came in from the ColdThis thread traces Fiedler’s attempt to turn suspicious payments, restricted files, and historical clues into a case against Mundt.
increasing
Bearing strength in each event
decreasing
The First Doubt

An Unusually Broad Source
Questioning Riemeck’s reach
Peters doubts that Karl Riemeck could have gathered the extraordinary intelligence Leamas describes. He asks whether someone senior helped the agent gain access.
A planted possibility
The question introduces the idea of a hidden collaborator without proving anything. Leamas’s uncertainty gives Fiedler a lead that can be developed through other evidence.
The File’s Circulation

Who Handled the File
Restricted readers
Fiedler asks who could access Rolling Stone and how it moved through London. Leamas recalls that the file was passed by hand and that Peter Guillam had a place on its distribution list.
A narrow path
The circulation pattern makes a broad section’s access look anomalous. Fiedler begins to infer that the file’s secrecy may conceal an operation directed at the GDR.
Guillam as a Clue

A Name Emerges
Recovered memory
Leamas remembers collecting the restricted file from Peter Guillam. He describes Guillam’s work on East German economic conditions as a possible cover for a small, hidden operation.
Suspicion shifts upward
The detail does not accuse Mundt directly, but it connects London’s restricted paperwork to the GDR. Fiedler sees a way to make the secret payments relevant to his own service.
The Bank Test

Seeking a Trace
Letters under assumed names
Fiedler has Leamas request statements from the Copenhagen and Helsinki banks. The letters are designed to expose whether anyone has drawn the money without Leamas’s knowledge.
Waiting for confirmation
The investigation shifts from memory to documentary evidence. Fiedler and Leamas spend the delay together, while the answer threatens to determine whether the theory can become an accusation.
A Theory Becomes a Case

The Mundt Hypothesis
Dates converge
The bank reports that the money was withdrawn when Hans-Dieter Mundt was in Denmark. Fiedler combines this with other travel and access clues.
Political danger
Fiedler believes he has found a traitor inside the Abteilung and seeks action against him. The evidence seems strong enough to move the conflict from private suspicion into a struggle for power.
During the first interrogation in Holland
During Fiedler’s questioning at the lodge
Later in the same lodge interrogation
During the week after letters are sent to the banks
After the Copenhagen statement arrives