The Journal of Lieut. John L. Hardenbergh of the Second New York Continental Regiment from May 1 to October 3, 1779, in General Sullivan's Campaign Against the Western IndiansWith an Introduction, Copious Historical Notes, and Maps of the Battle-field of Newtown and Groveland Ambuscade by Clark, John S. Beatty, Erkuries Dearborn, Henry Hardenbergh, John Leonard Hawley, Charles Grant, Thomas, active 1779
 is a Project Gutenberg book, now on Github.