John Crocket R.N.
Convict Ship Surgeon-Superintendent
*Date of Seniority Royal Navy 17 August 1815
John Crockett was included in the Navy List of Medical Officers of 1814.  He was appointed Surgeon on the Cygnet in 1819.
John Crocket was appointed surgeon on two convict ship voyages to Australia:
1). Prince of Orange to Van Diemen's Land in 1822
to New South Wales in 1824. He kept a Medical Journal from 27 May to 1 November 1824 
He was a brother of Henry Crocket of Van Diemen's Land. 
Unfit for Service 1841
John Crocket was on the List of Surgeons of the Royal Navy who were unfit for service in 1841
 Navy List 1814
 Australian Medical Pioneer Index
 Medical journal of the Mangles
convict ship from 27 May to 1 November 1824 by John Crocket, surgeon and superintendent