Fritz Rothberger (1902-2000) was a pioneer in the mathematical field known as "combinatorial set theory". Rothberger became a professor at Acadia University in 1943, where he worked until 1949 when he transferred to University of New Brunswick at Fredericton. Before retiring in 1970, he also worked at Laval and the University of Windsor. After retirement he returned to Acadia University and continued to teach mathematics until 1981. These personal papers of Fritz Rothberger include correspondence, working notes, drafts of papers, and a photograph. Article off prints have not been digitized.