John Glynn

He inherited his father's estate at Glynn in the parish of Cardinham, Cornwall, on the deaths of his elder brother and his nephew.

His elder brother died in June 1744, leaving an only son of weak intellect, against whom his uncle took out a commission in lunacy, and was appointed receiver of the family estates.

[2] On 24 January 1763 Glynn was created a serjeant-at-law, but as a result of his opinions in opposition to the court, he was never promoted to the rank of king's serjeant.

He then acted for Wilkes in his application for a writ of habeas corpus in May 1763, in the action against George Montagu-Dunk, 2nd Earl of Halifax, and in the trial which took place in 1764 on the republication of The North Briton in volumes.

[2] Glynn represented Woodfall before Mansfield in the case of the Letters of Junius, of which a subset were alleged to constitute seditious libel.

[2] In the winter of 1770 Glynn, influenced by Lord Shelburne, moved for a committee to inquire into the administration of justice in cases relating to the press, and to settle the power of juries.

[2] After meeting Glynn in 1770, Lord Chatham wrote, "I find him a most ingenious, solid, pleasing man, and the spirit of the constitution itself.

[4] Glynn was one of the leading members of the Society of the Bill of Rights, which at the end of 1770 addressed a provocative letter to the American colonies.

[2][5] Glynn was married on 21 July 1763 to Susanna Margaret, third daughter of Sir John Oglander of Nunwell in the Isle of Wight.

[2] Glynn suffered from gout and had to be carried into the House in April 1769 to vote against the motion for seating Henry Luttrell for Middlesex.