“Peterson Ranch” written on envelope. It is now known as the Schober ranch on the Teanaway. (Wes Engstrom) The tractor is a 1910 Moline Universal. The bailer is a Columbia 3 string (wire) bailer. (Kittitas County Museum)
Nicholson, John Allen and Engstrom, Wesley C., "Tractor, Thresher" (2009). John Allen Nicholson Pictures. 218.
John Allen Nicholson: His Diaries and Pictures (CDROM)