Williamson’s family, yeoman farmers from the lower Trent valley, were granted arms in 1602.
There is no record of Williamson being called to the bar, but he clearly practised as a lawyer during the 1590s,
Williamson is known to have helped Ferne with the interrogation of suspects arrested after discovery of the Gunpowder Plot, but the scanty records of the Council reveal little else about his activities.
The most serious dispute in which Williamson became involved was with Sir William Hickman, who had purchased the manor of Gainsborough from Lord Borough. An aggressive landlord, Hickman questioned tenures, increased market and river tolls, and encouraged poor cottagers to encroach upon the town’s commons. The burgesses complained to Williamson, who brought a suit against Hickman’s bailiff at the Lincoln assizes of summer 1609. At the Easter fair of 1610, Hickman responded by tearing up the railings which Williamson had installed around the town’s marketplace, but this snub backfired when he was chased away by Williamson’s servants. Hickman received scant sympathy from the town’s other j.p. Sir Thomas Darrell*, and both parties quickly referred the dispute to Star Chamber, where the case was apparently dismissed after a detailed investigation.
While Williamson’s professional interests were centred on York, his appointment as an extraordinary master in Chancery in 1609 suggests that he aimed for preferment at Westminster, and in March 1614, with a further promotion as master of Requests imminent, he had every reason to seek a parliamentary seat.
Williamson’s impending promotion doubtless encouraged his consistent support for the Crown’s interests in Parliament. He backed the return of attorney-general Sir Francis Bacon* to the Commons, whose office was thought to require his attendance upon the House of Lords as a legal assistant. When a vote to exclude Bacon was demanded on 8 Apr., Williamson was one of several lawyers who backed Speaker Crewe’s delaying motion to search the Journals for precedents. He was named to the committee appointed to conduct the search, and when the issue was next raised in the House three days later, he cited precedents for the return of the queen’s serjeant and solicitor-general, and insisted that ‘the precedents to disable him [Bacon] ought to be shown on the other side’. Despite his efforts, the House preferred the compromise suggested by James Whitelocke, whereby Bacon was admitted but future attorneys were to be barred.
Williamson was subsequently named to the committee for the small debts bill (11 May), which aimed to expedite suits for debts of less than £10 by preventing the use of writs of certiorari to remove them from inferior courts.
Williamson was named to one further committee, for the bill to punish the use of fictitious individuals as sureties for bail (16 Apr.).
While the usury bill only received one reading before the sudden dissolution of the Addled Parliament,
