This hypertext edition of Turner's The Frontier In American History is taken from the 1921 edition published by Henry Holt and Company of New York. The plates used for the 1921 edition, as well as most subsequent editions, contain Turner's spelling variations and the publisher's typographical errors. These anomalies have been preserved in this hypertext edition.

The only deviation from the 1921 edition can be found in the footnote annotation for Chapter III: The Old West. Here, Turner ended the initial footnote sequence at 99 and began a second set of footnotes beginning with one and ending with 35. The original numbering on the initial set has been preserved, but the numbering of the second set begins with 1a and ends with 35a. Hopefully, the reader will find this formula less confusing in the hypertext edition.