Oliver Sproule was appointed Assistant-Surgeon to the Batavier Hospital Ship on 26 July 1814.  He was on the List of Medical Officers who served at war..... he was Assistant-Surgeon of the Leander at Algiers .
He was appointed Surgeon on 16 September 1816.
He was appointed Surgeon to the Brisk in 1822. 
Oliver Sproule was appointed Surgeon Superintendent on five convict ship voyages to Australia:
Borneo to VDL in 1828
Larkins to NSW in 1829. Returned to England on the Wanstead.
He was on the List of Surgeons remunerated for services as Surgeon Superintendents in 1838. He was paid £170 for his employment on the immigrant vessel Strathfieldsaye from Limerick on 30th January 1838.
He was on the List of Surgeons of the Royal Navy who were fit for service in 1841, 1844 and 1852 and on the retired list in 1871
Oliver Sproule died in 1869 - February 1869 - Died Feb 17, at Brook Hill, near Omagh, Oliver Sproule Esq., surgeon Royal Navy, aged 82 years - Londonderry Sentinel