Here is a list of links to sites that cover issues related to the De Morgans and their circle.
Museums
Victoria & Albert Museum
The British Museum
Tate Britain
Cheltenham Art Gallery and Museum
Birmingham Museum and Art Gallery
Cecil Higgins Museum and Art Gallery
Russell-Cotes Art Gallery and Museum
Fitzwilliam Museum
The Watts Gallery
Fulham Public Library
Leighton House Museum<
William Morris Gallery
The Walker Art Gallery
Lady Lever Art Gallery
Manchester Art Gallery
Houses
Blackwell
Kelmscott Manor
Standen
Wightwick
Societies
Victorian Society
Pre Raphaelite Society
Morris Society
Tile and Architectural Ceramics Society
The National Association of Decorative and Fine Arts