The late Dr. Henry Sagan was an indefatigable collector of the German poet Rainer Maria Rilke and in 1963 the Library acquired his entire collection. The nearly sixteen-hundred items are first editions of all of Rilke's works in an astonishing number of issues and states including such rarities as the Zwei Prager Geschichten (Stuttgart, 1899), and two copies of Die Letzten (Berlin, 1902); later editions, both text and critical; translations; bibliographies; criticisms of Rilke's work; the works of authors who influenced Rilke and the works of his disciples. A particularly interesting portion of the collection, the acquisition of which must have taxed all of Sagan's collecting energies and ingenuity, is the large number of fugitive publications: periodicals in which Rilke was published or reviewed, newspaper articles, offprints, photographs, and ephemeral material. The collection has given rise to an international Rilke conference and a number of publications.