Item appears in the following exhibition pages
Roman Hat Mystery: A Problem in Deduction
Typescript with notes in pencil by Frederic Dannay
Dannay, Frederic, 1905-1982
Lee, Manfred B. (Manfred Bennington), 1905-1971
Rare Book & Manuscript Library, Columbia University
Frederic Dannay Papers
“Roman Hat Mystery: A Problem in Deduction,” Columbia University Libraries Online Exhibitions, accessed October 2, 2023, https://exhibitions.library.columbia.edu/exhibits/show/jewels/item/11200.