This is a great site for anyone interested in the history of newspaper and magazine cartooning.
The British Cartoon Archive is located in Canterbury at the University of Kent’s Templeman Library. It has a library, archive, and exhibition gallery, and is dedicated to the history of British cartooning over the last two hundred years. The BCA holds the artwork for more than 150,000 British editorial, socio-political, and pocket cartoons, supported by large collections of comic strips, newspaper cuttings, books and magazines. The collection of artwork dates back to 1904 and includes work by W.K. Haselden, Will Dyson, Sidney Strube, David Low,Vicky, Emmwood, Michael Cummings, Ralph Steadman, Mel Calman, Nicholas Garland, Chris Riddell, Carl Giles, Martin Rowson, and Steve Bell, amongst many others.