Dear Elaine, I couldn't find John S Harrison in the Margate St John's Parish Records. I checked 1800-1810 and only came across the below. Regards Suzannah Thomas HARRISON, son of Denwood and Ann, born 3rd Feb Christened 11th March 1800 William HARRISON, son of Denwood and Ann, born 7th Dec 1802 Christened 23 Feb 1803. Jane HARRISON, dau of Moses and Elizabeth born 20th May Christened 21st June 1807 Frances HARRISON, dau of Moses and Elizabeth, born Dec 15 1808 Christened 5th Feb 1809. Ann HARRISON, dau of Denwood and Ann, born 20th July Christened 16th Aug 1809