Wendy attended the king on his deathbed and was one of the witnesses to his last will and testament. Wendy is credited by John Foxe as being the informer to Queen Catherine Parr of the intentions of Thomas Wriothesley and Bishop Stephen Gardiner who would try to arrest the queen for heresy. Wendy had been appointed as physician to Henry's sixth wife, Catherine Parr, before October 1546. Wendy is believed to have had Protestant sympathies.
Wendy also served as royal physician to Henry's successors, Edward VI and Mary I. He was appointed an ecclesiastical visitor by Elizabeth I in 1556. He served alongside George Owen and Edmund Harman.
- Lee, Sidney, ed. (1899). "Wendy, Thomas". Dictionary of National Biography. 60. London: Smith, Elder & Co.
- J.G. Nichols (editor) (1848). "Notes to the diary: 1560". The Diary of Henry Machyn: Citizen and Merchant-Taylor of London (1550–1563). Institute of Historical Research. Retrieved 22 August 2013.
- Stanley Bindoff. The House of Commons: 1509–1558, Boydell & Brewer, 1982. pg 580-81.