Not sure if you already have this by now - I live in Thursby and have a full list of transcriptions of the gravestones in the old part of the churchyard.
Inscription on Robert Jackson's grave is -
Sacred to the Memory of Robert Jackson, M.D. Inspector of Military Hospitals who departed this life the 6th of April 1827 at Thursby aged 76 years. Blessed are the pure in heart for they shall see God.
Very interested in your previous postings regarding his history as I am researching the village history for a booklet we hope to publish to raise funds for the village. Thanks,
Jo