Oswald’s father, a wealthy merchant, who purchased Dunnikier in 1703, established an independent interest in Dysart Burghs, for which Oswald himself was returned unopposed in 1741. He was expected to support Walpole but joined the Opposition, voting against the Government on the election of the chairman of the elections committee on 16 Dec. 1741. According to Horace Walpole:
Sir R. [Walpole] sent a friend to reproach him; the moment the gentleman, who had engaged for him, came into the room, Oswald said, ‘You had like to have led me into a fine error! Did you not tell me, that Sir Robert would have the majority?’
Walpole to Mann, 22 Jan. 1742.
‘The surest way of becoming remarkable here’, Oswald wrote on 7 Jan. 1742, ‘is certainly application to business, for whoever understands it must make a figure.’
On the formation of the Broad-bottom Administration at the end of 1744 Oswald secured a commissionership of the navy. ‘The office named for me is one of trouble and business’, he wrote. ‘It is a sort of apprenticeship indeed to the greatest scene of business in the country.’
In June 1747 Oswald resigned his office which, under the Place Act of 1742, was about to become incompatible with a seat in the Commons.
I fear much he will not have a seat in the next Parliament [David Hume wrote] though it were a thousand pities. He sets out for Scotland in a few days with his wife, who seems to be a sensible woman but old and also dry and reserved ... She keeps, as they say, all in her own power; so that, to tell truth, I am not excessively fond of this marriage, though he is. But if it were not for the advantage of its enabling him to throw up his office and continue in Parliament I wish him rather a bachelor.
New Letters of David Hume, 28.
Contrary to expectations he was returned for Fife, though the Government’s interest went to his opponent. At first he ‘attended no court’, devoting himself to the study of trade, finance and colonial affairs;
offered to be made comptroller of the navy, with a promise of all Mr. Pelham’s power to reform the abuses of it, and full liberty to follow his own opinion in Parliament ... But as he saw no reform could be thoroughly and effectually brought about, but by the concurrence of the Crown, which was not to be hoped for in our present situation, he had much rather attach himself to his Royal Highness from whom only he could hope for that concurrence; but as he was no courtier and had no connexions of that kind, he must be contented to do his best in that station that was offered him.
He authorized Dodington to say ‘that he would refuse all offers of the Court’ if the Prince was willing to admit him into his service. This led to an audience with Frederick at which Oswald agreed to accept the office of clerk of the Green Cloth and ‘to kiss hands on Lady day’.
a master of a quickness and strength of argument, not inferior to Fox or any speaker in the House. The rapidity of his eloquence was astonishing; not adorned but confined to business.
After the Prince’s death Oswald re-opened negotiations with Pelham, who gave him a seat on the board of Trade. On 28 Feb. 1752 he spoke ‘with fine warmth’ for a bill empowering the Government to purchase forfeited estates in Scotland.
He died 24 Mar. 1769.
