This document is a copy of the United Kingdom Service Record for Lieutenant Commander Richard Hungerford Caldwell (IR4948).
Source: Royal Naval Officers' Service Records 1756-1931. The National Archives of the UK (TNA), Kew, Surrey, England. Series ADM 196. http://www.nationalarchives.gov.uk/records/royal-naval-officers-service-records.htm: accessed 3 May 2018.