While moving the family's possessions to
Mayne Island, Marks and his eldest daughter,
Caroline Harvey, took shelter from a squall at
Saturna Island. When camping on the beach, the pair were murdered and had many of their possessions
stolen. Their damaged boat was discovered several days later by
Mayer who then reported them missing to British authorities in
Victoria.A Lamalcha man,
Ul-wahn-uck was later tried and hung for the murders.