Well, I suppose one could deduce that Henry Barnes' spouse may have been a Miss Tilby (?). I have no record of a Tilby-Barnes marriage, not to say that it didn't occur. I also am not aware of any Tilby's in Cornwall, if indeed the Barnes family are from there. Again I'm assuming, given the Goldsworthy family is from that area.
I see that Benjamin and Jane were married June 1859. You could order their marriage record which might shed some light regarding Benjamins parents.
I check this site frequnetly, so will be reminded to look into this once in awhile. Be sure to post a message should you discover something.