If Constance Radcliffe was correct with those dates there is a will for John on Brian's index:
KERMOD, John 1791 Mau A 68 0106231, and you've ordered the correct one for Elizabeth, because her maiden name was given on the burial register (last message).

As both parents died after Ellen's marriage it is likely that Thomas Corkill received any legacy on behalf of his wife, which would be written at the end of the will documents.

Sue