Hello Lightheart,
You wrote: "Andrew Wilson Hearsey who had obtained a cadetship on the Bengal establishment in 1765."
Would man be related to Andrew Wilson Hearsey, born 20 Jul 1838 at Carshalton, Surrey, England? Who went on to become Major General Sir Andrew? I have him with a wife Harriet Eliza, and 12 children, including one named Theophilus Neville Hearsey born 1867.
In the tree I have compiled, Andrew's grandfather was Lieutenant General, Sir John Bennet Hearsey, born 21 Sep 1793 at Midnapore, Bengal, died 24 Oct 1865 at Boulogne, Hauts-de-Seine.
Andrew William HEARSEY is grandfather of Joseph Richard Hearsey (1906 - ), husband of Muriel Alice Millicent CASSELL (b1911 - ) who is daughter of George CASSELL (1874-1948).
Many thanks
David