Statement of responsibility: By Robert Campbell, one of the commissioners of the Niger Valley exploring party ; late in charge of the scientific department of the Institute for Colored Youth, Philadelphia ; and member of the International Statistical Congress, London.
Content: "Entered, according to Act of Congress, in the year 1860, by Robert Campbell, in the Clerk's Office of the District Court of the United States, for the Southern District of New-York."--copyright statement, verso of title page.
Content: "John A. Gray, Printer, Stereotyper, and Binder, 16 & 18 Jacob Street, New-York."--printer statement, verso of title page.