Customs authorisation and commission as Lieutenant in the CLARENCEof Thomas Hamilton and commission of Abraham Hamilton as navigating Lieutenant in HM Fleet.
Customs authorisation, 16 September 1819 and commission as Lieutenant in the CLARENCE, 14 Feb 1825 of Lieutenant Thomas Hamilton (1801-51) and commission of Abraham Hamilton (d.1868) as navigating Lieutenant in HM Fleet, 8 July 1867.