Hi Eric:
I can give you my connection through William Gelling and if it helps you - all the better!
His daughter, Elizabeth Margaret Gelling DOB 1821, Died 1867, married Robert Kelly (which you mention) in 1847 and they are my ggrandparents.
I could go further but I am not sure that your Gelling connections follows on from there through my Gellings. In the near future I will be obtaining William Gellings' will and see what that contains.
If you wish you can email me on:
marg(.)skillicorn(at)virgin(.)net
Regards
Marg