from Lon Cohen that the fatal bullet is a .38, and Wolfe has him bring everyone involved to his office that evening. Included in the group is Corey Brigham, a rival of Jarrell who benefited from the information leaks and who had been to dinner at the penthouse when the gun was stolen. Nora arrives by herself, well ahead of the scheduled meeting. With Archie observing through the office peephole and Orrie Cather posing as him, Wolfe tries to allay Nora's suspicions that Jarrell hired Archie to investigate the family. During the actual meeting, Wolfe appeals to the group to produce the gun, without success. Over the weekend, Inspector Cramer visits the brownstone demanding to know why Archie is working for Jarrell under an assumed name. Wolfe tells Cramer nothing except that he had not been hired by Eber, but Cramer questions the family and learns about the arrangement. With the pretense dropped, Archie is called in for questioning by the district attorney; not long after he returns to the penthouse, a news report announces that Brigham has been found dead, shot in the chest. Returning to the brownstone, Archie is soon called in for another round of questioning, during which he learns that Brigham was also killed with a .38. This fact prompts Wolfe to summon the principals to his office again and question them about their movements over a time period covering both murders. He returns Jarrell's retainer, then calls Cramer to get permission for Archie to copy the statements they have given the police, reassuring him that Wolfe does not currently know the identity of the murderer. Lois tries to persuade Archie to corroborate a claim that she took Jarrell's gun and threw it in a river in order to prevent anyone from using it, but he quickly realizes that she is not telling the truth. Once Wolfe has the statements, he sends Archie, Orrie, Saul Panzer, Fred Durkin, Dol Bonner, and Sally Colt to investigate every location visited by the principals. Four days later, a man delivers a small package to the brownstone; it proves to contain a spent .38 bullet, which Wolfe turns over to Cramer for testing. Following a night of repeated attempts by the police to call Wolfe or gain entry, Wolfe learns from Cramer that the bullet came from the same gun that killed both Eber and Brigham. He announces that he