Jervis, ‘a leading counsel on the Oxford circuit’ stood proxy for his second cousin Sir John Jervis at the Yarmouth election of 1796, in which he was unsuccessful. Sir John became Earl of St. Vincent a year later and encouraged Jervis to look to a seat for Yarmouth next time. On 11 Feb. 1800 St. Vincent applied for Jervis to succeed Spencer Perceval as counsel to the Admiralty when Perceval became solicitor-general; but did not expect Lord Spencer to comply. Later that year he obtained government support for Jervis’s pretensions at Yarmouth. In 1801 he took over the Admiralty under Addington and Jervis was appointed counsel and, after some manoeuvring, was returned unopposed to Parliament at the next general election. St. Vincent had spent £3,000 on his behalf at Yarmouth, but obtained the other return as well.
Jervis gave government his assistance on Admiralty business.
Jervis obtained a patent of precedence in February 1806 and supported the Grenville ministry’s repeal of the Additional Force Act, 30 Apr. On 14 Apr. he had brought in a bill to enable offenders on the high seas to be tried on the spot rather than in England; on 17 Apr. he concurred with Fox’s objection to the witnesses’ declaratory bill. He objected to Lord Archibald Hamilton’s motion on Indian affairs, 21 Apr., lest it prejudice the case against Lord Wellesley. Although he had ministerial support at Yarmouth at the ensuing election and spent over £1,000, he withdrew rather than squander about £8,000 on a contest. He complained to Lord Grenville of the unreliability of government dependants there and added that he was ‘not in a condition to incur any further loss of his fortune’. He returned to his profession.
