[Ellis], [G.A.]. New Britain. A Narrative of a Journey, by Mr. Ellis, To a Country So Called By Its Inhabitants, Discovered in the Vast Plain of the Missouri, in North America, and Inhabited by a People of British Origin, Who Live Under an Equitable System of Society, Productive of Peculiar Independence and Happiness. Also, Some Account of Their Constitution, Laws, Institutions, Customs and Philosophical Opinions: Together With a Brief Sketch of Their History from the Time of Their Departure from Great Britain. London: Ptd. for W. Simpkin and R. Marshall, 1820.
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