Thank you Eileen and Moren. Good information.
Also, on the Ulster Covenant, Edward signed with James Henry Abraham, William Gilkinson and David Parks. Both of the latter two are surnames linked with the Castles/Cassells [my main interest.]
Lizzie signed with Judith McComb, Rebecca Jane Turkington and Jane, Essie Jane, Minnie, Sarah Jane and Sophia, all ABRAHAM, and Mary Castles. Mary and Lizzie were from Derrymacash, the rest from Derryadd.
Do you think the tombstone inscription fits with my tree?