I believe they may have had a daughter called Clara Cuff Casson b. 01 Nov 1836 chr. 28 Mar 1837 (checked out on LDS site F: William Robert CASSON M: Mary Ann). Although she is nothing to do with my line I have a Clara Casson staying/recorded with my ancestors (Dibblee) on the 1851 Census. She is recorded as 14 years old and a visitor, birth place City Of London. I would very much like to know the connection if any.