[1] He was knighted in 1587, and welcomed the Scottish King James I to England while holding the post of High Sheriff of Hertfordshire in 1603.

for Essex in 1604, but on 27 October 1604, he was raised to the peerage as Baron Denny of Waltham.

[3] The appearance of Lady Mary Wroth's The Countess of Montgomery's Urania brought protests from Denny, objecting to portrayals of real people at the work.

[5] He particularly was stung by an incident from the work that to him seemed to allude to his own family life.

They had one child, a daughter, Lady Honora Denny, who married James Hay, 1st Earl of Carlisle.