Proby, whose active naval career had ended in 1816, when he had entered Parliament and joined Brooks’s, continued to sit for county Wicklow on the combined interest of his father and Earl Fitzwilliam. At the 1820 general election he offered again, promising ‘to bring passing events to the test of the most free and disinterested judgement’, and was returned unopposed.
I know nothing, nor have I courage to question him. You know how much his situation in Wicklow depends on Lord Fitzwilliam. But for two years he has not attended Parliament. I wished him much to attend the Catholic question, on his account, and my own. His not supporting it gives an impression as if I had abandoned a principle on which I have acted so long. And towards Lord Fitzwilliam it has the appearance of trying to make a party in the county independent of him ... Yet I think he would not vote against either me or you, and he feels strongly and expresses himself well, on the subject of Ireland.
BL, Fortescue mss.
Thereafter Proby made a slightly greater impression, voting for reduction of the salt duties, 28 Feb., and the number of lay lords of the admiralty, 1 Mar. 1822. He voted against inquiry into the currency, 12 June 1823, but next day was in the minority of 20 against an increase in the barilla duty. He voted for repeal of the assessed taxes, 10 May, and the leather tax, 18 May, and to condemn the trial of the Methodist missionary John Smith for inciting slave riots in Demerara, 11 June 1824. On 2 Mar. 1825 he was ordered to be taken into custody after defaulting on a call of the House. He gratified his father’s wishes by voting for Catholic relief, 21 Apr., and was appointed to the select committee on Irish prisons, 2 May 1825. No trace of parliamentary activity has been found for the 1826 session.
Early that year he had informed Fitzwilliam’s son Lord Milton* that the registry for Wicklow had been neglected by all except their respective fathers, the effect of which had been to strengthen Fitzwilliam’s hold on the county, and that he could ‘truly say that the seat is not less agreeable to me because I owe it so much to his support’. He wished Lord John Russell* electoral success in Huntingdonshire, where his family had their English estate, but doubted his chances.
Proby resigned his seat ... because he is a devilish odd fellow who grudged the trouble of a journey to London, and therefore, as I hear, made a bargain with Lord Fitzwilliam that if [he] would consent to his brother-in-law replacing him now, he would on future occasions support Lord Fitzwilliam’s nomination ... If Lord Carysfort should ever get well, it may create an awkwardness on this subject, because he probably would not think himself bound by his brother’s agreement ... but this difficulty is not likely to occur.
Add. 51534.
Thereafter, according to an obituarist, he was a ‘firm supporter’ of the Liberal party, but ‘took no active part in politics’.
