Relief indicated by hachures and spot heights. "Entered according to Act of Congress in the year 1855 by J.H. Colton ... " In margin: No. 99. Text on verso with caption title: The British Empire--no. 1. Probably issued in: Colton's general atlas ... New York : G.W. and C.B. Colton & Co., 1866. George W. and Charles B. Colton took over the business founded by their father Joseph H. around 1865. cf. Tooley's dictionary of mapmakers.