He moved to Wadham College, Oxford, later the same year and graduated with degrees of BA (1776) and MA (1781).
He became a fellow of Wadham in 1780, acting as librarian (1781–1782) and humanity lecturer (1782), resigning his fellowship in 1792.
[1] His writings included the tenth and eleventh editions (with Richard Burn) of Blackstone's Commentaries on the Laws of England (1787 and 1791) and the third edition of Sir Edmund Saunders's Reports of Cases and Pleadings in the Court of King's Bench in the Reign of Charles II, with additional notes and references.
[1] In 1789 Williams married Mary, eldest daughter of Charles Clarke of Forebridge, near Stafford.
They had three sons: Charles, Edward (a judge) and John (a colonel in the Royal Engineers).