Mark Michael Peter Mayhew was 25 when he disappeared from his family home in Sturgeon Falls, Ontario, on the night of November 30, 1973. He was last seen at home; by morning he was gone with no note and no known destination. His coat and boots were missing, and notably he had left his dentures behind, which he normally wore.

Mark, described as 5 feet 9 inches with a medium build, about 161 pounds, had short brown hair and brown eyes. At the time he vanished he was believed to have been wearing a gold corduroy winter parka or car coat, brown pants, winter boots, and a blue toque. He had no vehicle and lived with epilepsy, a medical condition that increased concern for his safety.

Both the West Nipissing Police Service and the Ontario Provincial Police have worked on the case, and his family has continued to seek answers. Did anyone in the Sturgeon Falls area remember seeing Mark or his coat and boots that night?