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Mabel Zahn (1890-1975). Philadelphia bookseller and from 1955 the president of the firm of Charles Sessler. From a description of the Charles Sessler records at the Historical Society of Pennsylvania,
“When owner Charles Sessler died in 1935, responsibility for its operations was divided between J. Leonard Sessler and Mabel Zahn. Zahn was in charge of rare books, manuscripts, and prints, servicing many important collectors and institutions, such as Charles J. Rosenbloom, Richard Dietrich, the American Philosophical Society, the Free Library of Philadelphia, and the Delaware County Historical Society. After J. Leonard Sessler's death in the 1950s, Zahn directed the shop until she passed away in 1975.”
See also mention of Zahn under the essay entry on "Bookselling" in the Encyclopedia of Greater Philadelphia.
