I have found a Mark CASSON at Harrington, Workington, in 1884. All attempts to find his birth have failed, and I can find no evidence to link him with any other Cassons at Workington. I found a reference to an Isabella Casson who was from the IOM. She married at Workington in the early 1800s. I know I am clutching at straws, but has anyone found any CASSONs on IOM?