source Map of Coal Mines on Formosa Island in of Volume 2 of the Narrative of the Commodore Matthew Calbraith Perry 's Expedition to Japan .

This map comes from the official record:

Hawks, Francis . (1856). Narrative of the Expedition of an American Squadron to the China Seas and Japan Performed in the Years 1852, 1853 and 1854 under the Command of Commodore M.C. Perry, United States Navy , Washington: A.O.P. Nicholson by order of Congress, 1856; originally published in Senate Executive Documents, No. 34 of 33rd Congress, 2nd Session.