ArtMagick: Hon. John Collier - Pre-Raphaelite Collection, short biography and examples of his major works including 'Lady Godiva'. - http://www.artmagick.com/archive/artists/collier.aspx
Artcyclopedia: John Collier - Links to works by the artist in art museum sites and image archives worldwide. - http://www.artcyclopedia.com/artists/collier_john.html
Artist of Distinction: Collier - Biography, and images with text. - http://www.listonart.com/Artists_Of_Distinction/Collier/Collier.htm