| | | | |
| Alexander Thomas Emeric Vidal R.N. | Explanation |
| Youngest of four children of Emeric Vidal RN. |
| |
| Date (from) | (Date to) | Personal |
| 1792 | | Born. |
| October 1839 | | Married Sarah Antoinette, daughter of Henry Veicht of Madeira, in Canada. |
| 5 February 1863 | | Died. |
| Literature: (DNB; O'Byrne). |
| |
| Date | Rank |
| 22 May 1807 | Entered Royal Naval Colle |
| 6 February 1815 | Lieutenant |
| 15 May 1823 | Commander |
| 4 October 1825 | Captain |
| 27 January 1851 | Rear-Admiral |
| 17 June 1859 | Vice-Admiral |
| |
| Date from | Date to | Service |
| 1 December 1803 | 1805 | 1st class Volunteer in Illustrious |
| November 1809 | 1812 | Midshipman in Lavinia |
| 181? | | Serving in Salvador del Mundo |
| 181? | | Serving in Niobe |
| 181? | | Serving in Cornwall |
| 181? | | Serving in Namur |
| 181? | 1814 | Serving in Conway |
| February 1815 | November 1815 | Lieutenant in Niobe as surveying officer in Canadian lakes |
| 25 August 1818 | 1823 | Lieutenant in Levin in Owen's surveying expedition to the coast of Africa (Levin, Barracouta, 1822 Table Bay, 1822-4 east coast of Africa to Zanzibar and Sychelles, 1825 west coast to the Gambia) |
| 15 May 1823 | | Commander in Barracouta in Owen's expedition |
| 1831 | | Captain in Pike briefly |
| 15 September 1835 | 1838 | Captain in Aetna surveying on west coast of Africa |
| 15 September 1841 | January 1845 | Captain in Styx surveying Azores |
| 7 January 1845 | | Additional Captain in William and Mary, commanded by Francis Augustus Collier, for surveying service |