Joseph Hugh Hughes was entered in the Navy List of Medical Officers in 1814.
He was employed as Surgeon-Superintendent on two convict ship voyages to Australia :
Chapman to Van Diemen's Land in 1826
to New South Wales in 1828
He was appointed to the Portland serving in the Mediterranean in May 1834
Joseph H. Hughes was on the List of Retired Navy Surgeons in 1841
3rd September 1859 - At Islington, aged 87, Joseph Hugh Hughes, surgeon in the Royal Navy. The deceased was grandson and heir of George Baron Sempill and Elliottstown, of Renfrew, N.B., whose titles and estates were forfeited as a consequence of the great Rebellion of 1745. For some time prior to his death the deceased resided with his niece, the Hon. Mary Catherine Seton (now Broadbent), only daughter and only surviving child of the late Sir John Seton, bart, of Garleton, who was also Earl of Winton .
 The Navy List
 The New Navy List
 Gentleman's Magazine