Cecilia Krieger (1894-1974) was the first woman, and the third person overall, to earn a doctorate in mathematics from a Canadian University (1930). While still a graduate student at the University of Toronto, she was appointed as an instructor in mathematics in 1928, and became a lecturer in mathematics and physics in 1931 after spending some time at Göttingen upon completion of her degree. After 12 years she was promoted to assistant professor at the University of Toronto and taught at that rank until her retirement in 1962. Her best known contributions to mathematics were the translations of two books on topology by Waclaw Sierpinski.
Much of the correspondence is in Polish and is from Waclaw Sierpinski, the Polish mathematician whose work she translated for her doctorate.