Don't know if peculiar to this church, but I've seen the mother's married surname used in some church baptism records generally (which is infuriating). If you stick "Henderson" in mother's surname in this case, all three records come back.
Thanks, gaffy. Doh! Silly me....I usually try that as a possibility and in my 'excitement' at the potential finds, didn't. And yes, I too have seen that happen, so should have thought about it. Thanks for lending a 'fresh brain' to the equation.
Only trouble now is, if they did put her married name on the church records, I still won't be able to prove it is the right group (albeit it does seem likely they are) without some further clues - methinks I really do need to see Glendermott records, and not just for these births but for other Henderson entries too. And roll on the arrival of the 'scotlandspeole style' GRONI records online, so I can purchase (cheaper than other options) the actual 1856 marriage record for John and Sarah and hope it records his townland (especially if it happens to be a Clondermot one - wouldn't that be wonderful). Pity the births missed Civil Registration.
This is already opening up some new possibilities to part of the line that was at the 'brick wall' stage. Another researcher had tempted me closer to the Dungiven area for the Hendersons, but now, considering Clondermot and re-checking Griffiths Valuation, and Revision Books, there encouragingly was a John Henderson listed at property 6a Clooney, Clondermot and an Elizabeth Henderson at 6b. There was also a John Henderson in Clondermot at 1831. The John who married Sarah had known parents John and Betsy Henderson. Betsy was nee Adams and I see Griffiths also have Adams families in Clondermot, albeit not in Clooney itself. Again, could all be wish-full thinking on my part, but certainly a coincidence worth pursuing further.
Various changes on the Revision Books from c1868 to mid 1870s involving property 6a and b (bit hard to see exactly which date goes with which change, even given the colours used, as so many), so likely need to find deaths for John and Elizabeth. A few possibiities on Civil Index at FindMyPast, but in Magherafelt and Ballymoney district. I think Clooney did come under Magherafelt district for a time, but need to check further to see if Ballymoney would also have been a likelihood for registering a death from Clooney. Certainly, this possibility is sounding a bit closer to another researcher's 'word of mouth handed down' family 'knowledge' that John (husband of Betsy, and likely Sea Captain) 'may have been buried between Limavady and Dungiven' (a relative of the other researcher, a great uncle I think, had apparently visited the grave at some time, but no firmer details of location could be recalled).
I am also re-visiting the possibility of John (husband of Betsy) having been a 'captain' and worked 'between Larne and Stranraer' - again passed to me from a researcher whose side of the family had passed this 'knowledge' down by 'word of mouth', but then also found by me as 'Sea Captain', recorded on the death certificate I have for John (husband of Sarah). For some reason I had previously thought of 'Larne to Glasgow' route and investigated that over the years, but now see from this article I found today
http://www.derryjournal.com/news/your-community/nostalgia/scotch-boat-collision-on-the-foyle-1-3617453 that there were regular passenger ferries on the Londonderry - Glasgow route in the right timescale, so more investigation needed, as a route from Londonderry would seem more likely for someone who apparently was himself from the Londonderry area.
Isn't if great when you re-visit a line and old research and see new possibilities that you might have missed previously! No wonder I always say to folks to write down all possibilities and thoughts and keep them with other research, then re-visit same at intervals, as you never know what you might 'see' differently or better still, what newer online sources might be available that weren't previously (and why I answered my husband recently 'but they are my thoughts from the time/s I researched previously and I might see something different in them at a later date', when he asked why I had
thousands so many hand
scribbled written notes and arrows in my family history files
).