Ton Hian Tan, also known as Francis Tan, was 24 when he stopped communicating with family in the autumn of 1962 and disappeared from Toronto, Ontario. A recent McGill mechanical engineering graduate working at Penn Controls Ltd., he was last linked to Toronto addresses including 200 Tower Drive in Scarborough. Reports conflict on the exact last sighting: colleagues said he was seen on a Friday, while a landlady later said he left with two Asian automobile dealers to go to Montreal. His sister disputed that, saying his belongings remained in Toronto.

Tan was described as 5 feet 8 inches, about 130 pounds, with straight black hair and brown eyes, wearing a white shirt and a dark blue McGill blazer pocketed with the university crest. In 1968 the landlady was convicted of cashing three checks from his bank account written in October 1962; she said the money repaid a loan but forgery charges were dropped and no charges were ever filed in connection with his disappearance. No resolution has been reported.

Did anyone in Toronto or Montreal remember seeing Tan or the car he had recently bought in late October 1962?