Here are some more primary source strength returns for the Americans in the 1777 Northern Campaign.
Artillery at Fort Schuyler, July 1, 1777:
American Forces under Schuyler, July 26, 1777:
Troops Under Warner at Manchester (@ early August, 1777):
Return of Warner’s Regiment, August 30, 1777:
American Casualties, September 19, 1777:
American Forces Under Gates, October 4, 1777:
Again, most of these were found buried in the online archives of the New York Public Library.