Oh gosh,
For someone that is so distant, you have access to some amazing information. Thank you.
Undoubtedly, we are on the same wavelength as regards the same Glass family.
My struggle is to find someone in the 21st century that is descended from any of those siblings, and a bonus would be to find someone alive that can confirm any involvement with Henry Matier Glass and / or his siblings.
I have traced his 2 daughters to South Africa where they died, both childless. But unfortunately, I have failed to find a living descendant in Ireland at present.
So that is my current dilemma !!
Michael.