Bacon’s father was a younger son of the Elizabethan lord keeper, and Bacon himself, like so many of the family, entered the legal profession. An active Parliamentarian during the Civil War, he was chairman of the central committee of the eastern association, and published an attack on the prerogative in 1647. Secluded at Pride’s Purge, he soon conformed to the republican regime and was appointed a judge of the Admiralty. As recorder of Ipswich, he represented the borough with his younger brother in all the Protectorate Parliaments, and served Cromwell as master of requests. But by 1659 he was ready to denounce ‘the tyranny of a Commonwealth’, and he did not sit with the Rump on their second restoration in December. He signed the Suffolk petition for a free Parliament, and returned to the House with the secluded Members in February 1660.4C. Holmes, Eastern Assoc. 124; D. Underdown, Pride’s Purge, 345; Gent. Mag. xcv. 21; Suff. and the Gt. Rebellion, 128.
Bacon was re-elected to the Convention, and marked as a friend by Lord Wharton, who assigned him to the mangement of William Ellys. An inactive Member, he was appointed to five committees by full name, including those on the bills for confirming the privileges of Parliament and for settling ecclesiastical livings. It was probably he who spoke on 10 July 1660 against a motion to double the poll-tax on Protestant nonconformists as well as Catholic recusants. Together with Matthew Hale he was ordered on 10 Aug. to bring in measures to restrict the granting of leases of church lands and to provide for the endowment of vicarages out of impropriate rectories. He made his will on 26 Aug. and was buried at Barham on 1 Sept. None of his descendants entered Parliament.5Bowman diary, f. 62z; CJ, viii. 116; East Anglian, n.s. iv. 34.