Hi Kim
Thanks for getting back to me - yes the marriage is there under Clisham but the rootsireland.ie site does not consider it a variant of the spelling of Crisham, if that makes sense so it escaped my search.
One of the issues is that both Tullynadaly Rd and Tullynadaly are mentioned. I asked my grandmother yesterday (see is 99) if she remembered any Heneghan or Clisham families living in Tullynadaly but she said to her knowledge there are none and that it was probably spelt Crisham. Tullynadaly actually extends quite a few miles outside the town and runs into Tullynadaly Road where is stops at Bridge Street in the town. There are no Crushim/Clisham entries on the Griffith's Valuation that I can find, neither are there any Heneaghan entries in Tuam parish. Heneghan wouldn't be a name much associated with Tuam which makes me wonder if her husband and therefore she was born outside the parish or in another county (it is much more associated with Co. Mayo).
As a longshot I had a looked on familysearch.org as they allow a search without a surname and surprisingly there are only about 15 girls, first name Mary born in Tuam between 1820-1825. You could take a look and see if the sponsors' names mean anything to you:
https://familysearch.org/search/record/results?count=20&englishSubcount…
It's such a pity we only have her surname by her first marriage and we don't know for sure if she was from Tuam or born outside the parish - perhaps in Cummer or Lackagh as I mentioned earlier.
Clare
Genealogy Support