images from the collection of the Former Royal Tropical Institute, now held by the University of Leiden library.
http://hdl.handle.net/1887.1/item:782746
Copyright: Creative Commons CC-BY
Seaways & Gatekeepersimages from the collection of the Former Royal Tropical Institute, now held by the University of Leiden library.
http://hdl.handle.net/1887.1/item:782746
Copyright: Creative Commons CC-BY