Please could you let me know the source of the old map of Borneo you have used in your article on the Matan diamond? The map shows the location of Borneo's diamond mines. I would like to know which book or other source it came from?
Many thanks
Please could you let me know the source of the old map of Borneo you have used in your article on the Matan diamond? The map shows the location of Borneo's diamond mines. I would like to know which book or other source it came from?
Many thanks
