Denny’s father, a Suffolk yeoman, was sufficiently prosperous to give his son a gentleman’s education. Denny excelled, becoming a scholar at Caius College, Cambridge, before being admitted to Barnard’s Inn and then Gray’s Inn, where he was called to the bar. He subsequently acted as fee’d counsel for both Norwich and Great Yarmouth, and as a legal advisor to the wealthy East Anglian Paston family.
Returned for Norwich in 1621, Denny delivered his maiden speech on 15 Feb., after the Shaftesbury Member, Thomas Sheppard, criticized the Sabbath bill and accused its supporters of being puritans. Like Sir Walter Hele, Denny thought that Sheppard should explain himself at the bar of the House.
Most of Denny’s contributions in 1621 concerned fishing matters, among them the bill to suppress the taking of tithes for fishing voyages, which received a second reading on 26 February. As many Norwich and Norfolk ministers were paid by this method, Denny attacked the bill, stating that it overturned a statute of 1548 which provided for the maintenance of ministers. He drew upon his classical education to illustrate the point:
There were two notable persecutions, one under Domitian, the other under Diocletian. The one was occidere presbiteros, which though it were cruel, yet it brought a great increase into the church for sanguis martyrum est semen ecclesia. But the other was occidere presbiterium, which was far the greater. The bill seems to be guilty of the latter because take away maintenance and you take away the ministry.
CD 1621, ii. 135-6; iv. 103-4; CJ, i. 526b.
Although not named to the committee, he was eligible to attend as one of those who had spoken on the bill. The following day Denny spoke on the seamarks and mariners bill, supporting the Trinity House of Deptford against Sir Edward Howard I*, who had erected a lighthouse at Dungeness, and Sir John Meldrum and Sir William Erskine, who had done the same at Winterton, in Norfolk.
Denny spoke to both bills on drunkenness introduced in 1621. One sought to maintain the price of strong beer and ale at 8s. per barrel, which he claimed was too high.
Denny was named to legislative committees on concealed lands (2 Mar.), the levying of debts in the king’s name (6 Mar.), and jeofails (2 May).
Granted leave of absence from the House on 7 Mar. because his wife was ill, Denny delayed his departure for a few days, for on 9 Mar. he reported a bill for Painswick manor in Gloucestershire, which concerned a dispute between Henry Jernegan, a Norfolk gentleman, and his tenants.
Between the 1621 Parliament and his re-election for Norwich in 1624, Denny continued to pursue his legal career. In 1622 he was called to be an ancient at Gray’s Inn,
Denny played little part in the 1625 Parliament, making no known speeches and being named to just one committee, concerning a bill on petty larceny (25 June).
In September 1640 the Privy Council ordered Denny to investigate the rumour, ‘much disquiet[ing] the common people’ in Norwich, that the Scottish army was coming to burn the city within the week. Although Denny succeeded in identifying the person responsible for spreading this gossip,
