Thanks so much everyone!

Greensleeves: I wasn't sure about the gloves - his hands looked too well defined to me to be in gloves, but I see what you mean about that tiny sliver of his head - even that looks a little darker than the other folks skin tone from what little is visible.
Prue and Jim: Thanks for the dating - very helpful, now I can go have a look to see who 'fits' age wise and married around that time.
Sylvia: Thanks for the link - fascinating stuff. I LOVE old photos!
Seoras: My cousin suggested the groom was maybe cut out for a locket, but that's just conjecture.