A. A. Milne 
Mr. Pim Passes By: A Comedy in Three Acts 

Mr Pim Passes By is a three-act comedy by A. A. Milne, first produced in 1919, and seen in the West End in 1920 and on Broadway and in Australia in 1921. There were later stage revivals in London and New York, and the play has been adapted for radio, television, and cinema. The play centres on the turbulence in a respectable English household when the fallible memory of an elderly visitor leads a husband and wife to believe that they may inadvertently be bigamously married. The play takes place at the Marden house in Buckinghamshire.