| | | | |
| Algernon Frederick Rous De Horsey R.N. | Explanation |
| Son of Spencer de Horsey, of Great Glenham, Suffolk |
| |
| Date (from) | (Date to) | Personal |
| 27 July 1827 | | Born |
| 1861 | | Married Caroline, daughter of Admiral Andrew Drew |
| 1871 | | Naval Aide-de-camp to Queen Victoria |
| 20 September 1876 | 21 July 1879 | Commander-in-chief, Pacific |
| 9 November 1903 | | K.C.B. (Knight Commander of the Bath) |
| 22 October 1922 | | Died (at Cowes) |
| |
| Date | Rank |
| 1840 | Entered Navy |
| 26 July 1846 | Lieutenant |
| 10 June 1853 | Commander |
| 7 September 1857 | Captain |
| 7 May 1875 | Rear-Admiral |
| 27 November 1879 | Vice-Admiral |
| 29 April 1885 | Admiral |
| 25 July 1892 | Retired Admiral |
| |
| Date from | Date to | Service |
| 10 June 1853 | | Commander in Devastation, North America and West Indies |
| 30 November 1855 | | Commander in Victor, North America and West Indies |
| 4 May 1859 | 24 February 1862 | Captain in Brisk (from commissioning at Plymouth), Cape of Good Hope (until invalided) |
| 7 May 1864 | 1 November 1865 | Captain in Wolverene (from commissioning at Woolwich), North America and West Indies |
| 1 November 1865 | 20 December 1867 | Captain in Aurora (until paying off at Plymouth), North America and West Indies, senior officer on the Canadian lakes (during the Fenian disturbances) |
| 25 May 1868 | 11 May 1871 | Captain in Hector, Ship of First Reserve, Coast Guard, Southampton Wate |
| 1872 | | Commodore in Aboukir, Receiving ship, Jamaica |
| 20 September 1876 | 21 July 1879 | Commander-in-chief, Pacific (engaged the Peruvian rebel turret-ship Huascar on 29 May 1877) (flag in Shah) |
| December 1884 | May 1885 | Commander-in-chief, Channel squadron |