David Rumsey Historical Map Collection
online collection of more than 15,800 maps, focusing on rare 18th and 19th century North American and South American maps, with historic maps of the World, Europe, Asia, and Africa (Cartography Associates)

Pictorial Images of the Transatlantic Slave Trade
searchable database of images: from African societies to New World auctions, as well as maps, and photos of a recent archaeological dig of a West Indies plantation (Jerome Handler and Michael Tuite)

Tunisia in the Sixteenth to Eighteenth Centuries
resources for students (CR Pennell)