It's always good to relook at things.
Yes, I'm still sure the 1819 John belongs to the Schoolmaster Gellings.
But I'm now less sure that the 1841 Marown burial belongs to him. First of all he should be 22 rather than 21 but that's a nit. But there's a 1841 Marown will and I think it's odd that a 21-22 year old would have a will.
I don't think we should eliminate Jean's original idea just yet. That will would be useful to see.