The alumni directory published in 1921, which covers 1849-1919, is considered to be the most complete of the early directories. It lists graduates alphabetically by name (including degree granted, date, and where he/she was living in 1920/1921), by year of graduation, and by state or country of origin. It also includes a directory of faculty members and officers up to 1919.
"Bulletin of the University of Wisconsin ; serial no. 1082. General series ; no. 866."