William Howard, 1st Viscount Stafford (1614-1680), Implicated in Popish Plot
- Description of portrait held by the National Portrait Gallery, London.
- http://www.npg.org.uk/live/search/person.asp?LinkID=mp04238

Blessed William Howard
- Brief note on the martyr, beatified in 1929.
- http://www.saintpatrickdc.org/ss/1229.htm#will

Ven. William Howard
- Biography of the Viscount Stafford, who headed the list of Catholic lords pursued by Titus Oates in the so-called Popish Plot. Imprisoned in the Tower and tried before the House of Lords, Stafford was executed in 1680.
- http://www.newadvent.org/cathen/07504a.htm