sentences:  Doris enters, reveals that she saw Gudgeon carrying a revolver the day of the murder, and quickly leaves.Sir Henry enters, and upon being questioned about his firearm collection, says that the gun Gerda was holding at the time of the murder was among them, and that he had brought it to the target alley but had subsequently found it missing.Coulqouhoun states that ballistics evidence prove it was not the murder weapon after all.