| | | | |
| Henry Mangles Denham R.N. | Explanation |
| Son of Henry Denham, of Sherborne, Dorsetshire |
| |
| Date (from) | (Date to) | Personal |
| 28 August 1800 | | Born |
| 1826 | | Married Isabella (died 1865), daughter of Rev. Joseph Cole, of Carmarthen |
| 28 February 1839 | | F.R.S. (Fellow of the Royal Society) |
| 1866 | | Knighted (for his hydrographical services) |
| 3 July 1887 | | Died |
| |
| Date | Rank |
| 26 December 1822 | Lieutenant |
| 20 March 1835 | Commander |
| 17 August 1846 | Captain |
| 5 March 1864 | Rear-Admiral |
| 1 April 1866 | Retired Rear-Admiral |
| 14 July 1871 | Retired Vice-Admiral |
| |
| Date from | Date to | Service |
| October 1827 | | Lieutenant commander in Linnet, surveying the coast of France |
| September 1828 | March 1835 | Surveying the Bristol Channel, and the ports of Liverpool and Milford |
| 15 January 1842 | | Commander (2ic) in Lucifer, commanded by Frederick William Beechey, coast of Ireland |
| 30 July 1845 | 28 November 1846 | Commander in Avon (until paying off at Woolwich), west coast of Africa |
| 18 February 1852 | | Captain in Herald, Fiji islands |
| 1 April 1857 | | Captain in Herald, Fiji islands |
| 10 May 1864 | 21 November 1866 | Commander-in-chief, Pacific |
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