The December 11 1947 edition of the Toronto Daily Star had a brief article on a man who was going into taverns and pretending to be Tom Longboat, a famous Canadian runner:

Sadly, Tom Longboat was not alive for very long after this article appeared: he passed away from pneumonia in January, 1949.
Oddly enough, this wasn’t the first time that Longboat had been plagued by an impersonator. In 1917, a man named Edgar Laplante travelled around America giving concerts and pretending to be him, and then enlisted in the U.S. Army Transport Service under Longboat’s name. When the fake Longboat was killed in action, newspaper stories reported his death. His wife believed them, and remarried in 1918; when the real Longboat returned, she preferred to remain married to her new husband. Undaunted, Longboat remarried and had four children.