"'The papers of Sir William Johnson' published in 14 volumes, including a General Index, were edited under the direction of the New York State Historian from 1921-1965. Valuable for colonial research, the earliest six volumes have been out-of-print for years, unavailable for sale from the New York State Education Department.
"The complete 14 volume set, along with the 'Calendar of the Sir William Johnson manuscripts in the New York State Library' compiled by Richard E. Day in 1909, is now available online in PDF format from the New York State Library's digital media management system at
http://purl.org/net/nysl/nysdocs/423659." -- From the New York State Library
I could have posted this in "The Northern Campaigns," even though Johnson died in 1774, just because he and his family's effects on the Iroquois, New York's frontier, and the Revolution were so huge.