John Whitmarsh was appointed Hospital Mate on 24 July 1806. He was appointed Assistant Surgeon 24 July 1809.
He was appointed Hospital Mate at Gibraltar in 1810 and Hospital Mate at Haslar in 1815 
He was appointed Surgeon Superintendent on the Morley
in 1818. The Morley departed the Downs 30 July and arrived in Port Jackson on 7 November 1818
John Whitmarsh returned to England on the Shipley in April 1819 with seven other naval surgeons.
Notes and Links
Marriages - Duncan - Chesallier -On October 23, at Holy Trinity Church. Brompton, Peter Martin Duncan, M.B. Lond., F.R.Š., Professor of Geology in
King's College, London, to Mrs. Mary Chesallier, eldest daughter of the late John Whitmarsh, Surgeon R.N.
The Naval Chronicle Volume 34 July December 1815
The Medical Times and Gazette 2 November 1872