Fifty-two discoveries from the BiblioPhilly project, No. 16/52 Book of Hours for the Use of Rome (Hours of Étienne Thirion), Philadelphia, Philadelphia Museum of Art, 1945‑65‑14, inside front cover (with Arthur Brölemann bookplate) and Book of Hours for the Use of Rome (Victorines d’Auxy Hours), Philadelphia Philadelphia Museum of Art, 1945–65–15, inside front cover…