Variations in spelling and hyphenation were retained as they appear in the original publication, except that obvious typographical errors have been corrected.
A prequel to this story appears in Edward Willett, The Gray Scalp; or, the Blackfoot Brave, Beadle’s Dime Novels, No. 205, Beadle and Company, New York, 1870, which is posted on Project Gutenberg ([#56175]).
The title in the back cover entry for American Tales, Second Series, [No. 13], is incorrect and should be The Mysterious Spy.
The following change was made:
[p. 85]: “for” inserted (reason for his)
[back cover]: “of” inserted (Prisoner of La Vintresse)