Interestingly, I was researching the Cason family in Suffolk Record Office only yesterday.

Amongst entries for John and Rebecca Cason (my gtx4 grandparents) I recorded the marriage of:
Charles Cason of Debenham, Sfk and Sarah Watcham of Eye, Sfk on 8th November 1809 at Eye Church.

This is the one you have referred to above. I also found a lot of peripheral information but am not sure how much would relate to you.

ROD CROSS