Julie, that certainly looks possible - need to work on it. I wondered if they had emigrated as none of that part of the family was showing up but again couldn't find anything, so that is fab - thanks.
(I have a bap date of 9 Sept 1827 for Catherine so that fits quite nicely.)

Do you have access to the passenger record & could send me it....?

BTW the Henry you found is from another line of the family.

Will let you know how I get on,
Beverley