Proby entered the Navy on 21 March 1798 as a midshipman aboard the 74-gun ship under the command of Captain Edward Berry, and serving as the flagship of Sir Horatio Nelson. Proby saw action at the Battle of the Nile on 1 August 1799, then transferred to the ship with Captain Berry, and while blockading Malta, took part in the capture, on 18 February 1800, of the ship and the armed store-ship Ville de Marseilles. He also took part in the action of 31 March 1800 in which Foudroyant, in company with the 64-gun ship and frigate, captured the French ship, the flagship of Rear-Admiral Denis Decrès, during which Foudroyant sustained a loss of 8 men killed and 64, including Proby, wounded. In 1801 he was present in Foudroyant under Admiral Lord Keith during the Egyptian campaign. He then served aboard the frigate, under Captain Robert Campbell; the frigate, Captain Hon. Philip Wodehouse; and, flagship of Lord Nelson. There, on 24 October 1804, he was promoted to lieutenant, and transferred to the frigate, Captain Ross Donnelly. In May 1805 he transferred to the 98-gun ship, Captain Thomas Fremantle, and was present on 21 October in the Battle of Trafalgar. On 15 August 1806 Proby was appointed commander of the sloop Bergère, and promoted to post-rank on 28 November 1806, with command of the 54-gun ship Madras. From 7 January 1807 he commanded the frigate in the Mediterranean, and from 1808 until 1810, the frigate, in the Channel, North Sea, and Baltic. On 8 June 1813 he was appointed to, stationed at the Cape of Good Hope, and on 3 December 1814 to, in the Mediterranean. Amelia was paid off in July 1816, ending Proby's active naval career. However, the course of time brought promotion to rear-admiral on 23 November 1841, to vice-admiral on 16 June 1851, and finally admiral on 9 July 1857.
Political career
Apart from his military career Carysfort also represented County Wicklow in Parliament from 1816 to 1829 and served as High Sheriff of Wicklow for 1831. In 1855 he succeeded his elder brother to the earldom and entered the House of Lords.
Personal life
Proby married in 1818 Isabella Howard, daughter of the Honourable Hugh Howard. They had four sons and four daughters. She died in 1836, shortly after the birth of her youngest child. Lord Carysfort died on 3 November 1868, aged 85, at the family estate of Elton Hall, and was succeeded in the earldom by his second but eldest surviving son Granville. Children included:
