Date of Seniority Royal Navy 21 August 1810
William Henry Trotman was born in Barbadoes in 1785.
He was Acting Surgeon's 2nd Mate on the vessel Spartiate
at the Battle of Trafalgar in 1805. He was 20 years old. 
. Select here
to find out more about the Union Jack that flew on the Spartiate
at the Battle of Trafalgar.
William H. Trotman was entered in the Navy List of Medical Officers in 1814
William Henry Trotman was employed as Surgeon Superintendent on two convict ship voyages to Australia:
to New South Wales in 1829
to New South Wales in 1831.
He was on the List of Surgeons of the Royal Navy who were fit for service in 1841.
William Trotman age 76 can be found in the 1861 Census residing in Bristol with his wife Jane age 40. William records his place of birth as Barbadoes and Jane was born in Ireland.
William Henry Trotman of Charlotte Street, Park-street, Bristol, Surgeon R.N. on the retired list, died age 77 on 23 April 1862.
He was buried at Arnos Vale Cemetery Arnos Vale, Bristol, England. 
William Trotman's widow Jane was Executrix of his estate which was valued at under £2000
 National Archives UK
 Navy List
 Find a Grave
 Ancestry.com. England and Wales, National Probate Calendar (Index of Wills and Administrations), 1861-1941