Hello Karen,
When I wrote (22 April) "... 1785 is certainly a better birth year for Robert Corkill, widower of Esther. Possibly Robert bapt 20 Dec.1784 Maughold son of John Corkill & Ellinor Casement", I had no proof that this couple were the correct parents for Robert.
Would you please post your source (perhaps a will?).
Thanks,
Sue