On October 25, 1954, 79-year-old Tersilla Catterina Bonthoux, also known as Cecile and Cecille, was last seen walking from Duck Lake toward a farmstead she once called home, an eight-mile route through the Titanic District. She was described as petite, five feet tall and about 99 pounds, wearing a black coat. After she failed to arrive at the homestead she was reported missing and searches by law enforcement and local residents turned up no trace.

Decades later a local rumor that she might be buried in a cellar prompted the RCMP Historical Case Unit to investigate in 2009. An archaeologist and ground-penetrating radar were used on the property named in the tip, but nothing was found. The investigation remains open and active.