He came to the attention of Bishop Gardiner who sent his agent, Dr John London, to arrest him.
On 14 February 1554 Bishop Gardiner charged Ferrar with violation of chastity.
He also acted as chaplain and confessor to Bishop Gardiner.
London acted alongside Bishop Gardiner to agitate against Cranmer in Windsor.
Letters by London intended for Bishop Gardiner were intercepted, which exposed his role in the conspiracy, and he was convicted of perjury.
He attached himself to the ultra-Protestant party, and according to Bale designed the murder of Bishop Gardiner, but of this there is no evidence.
The Duchess of Suffolk once gave a banquet and during a party game afterwards named Bishop Gardiner as the man she loved least.
He saw how Earl Douglas now made a sign to Bishop Gardiner, and how he quickly answered it.
You were just going to make this move, which was to ruin me, when Bishop Gardiner entered.
Catharine said, earnestly: "Do but believe me, my husband, Bishop Gardiner alone was the cause of my fall.