Example image of eyePlorer eyePlorer map for 'Drake's Plate of Brass': Brass Forgery Francis Drake Northern California Hoax English writing style History Manufacturing Spelling Authenticity Metallurgy Science Practical joke Bancroft Library University of California, Berkeley Golden Gate San Francisco Bay E Clampus Vitus Herbert Eugene Bolton M. H. de Young Memorial Museum San Francisco Drakes Bay Marin County, California San Rafael, California California Historical Society Robert Gordon Sproul 1937 April 6 Patina Columbia University San Anselmo, California Sir Francis Drake High School Elizabeth II of the United Kingdom Lawrence Berkeley National Laboratory University of Oxford Microscope X-ray scattering techniques Cyril Stanley Smith Massachusetts Institute of Technology Dr. Futurity Philip K. Dick Careening Golden Hind New Albion List of hoaxes Drake in California