Relief shown by hachures. "Entered according to act of Congress in the year 1855 by J. H. Colton &amp; Co. ..." Prime meridians: Greenwich and Washington. From Colton's general atlas. 1861. Insets: Harbor &amp; islands of Amoy -- Map of Canton and adjacent islands. Text on verso. At lower right: No. 28. Available also through the Library of Congress Web site as a raster image.
J.H. Colton &amp; Co.
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