When Marlowe arrives , he finds Mavis is indeed there .
Steelgrave has been killed with a gun of the same type that Mavis used to threaten Marlowe in the hotel room , and of the same calibre as the gun used to shoot Orrin .
When Marlowe arrives , he finds Mavis is indeed there , but Steelgrave has been killed with a gun of the same type that Mavis used to threaten Marlowe in the hotel room , and of the same calibre as the gun used to shoot Orrin .