The nearly 7,000 volumes in this aggregate research collection were acquired by the School of Theology Library in 1999 by Dr. Raymond Van De Moortell, STH Head Librarian. The collections came from various sources, but principally reflect library materials deaccessioned from the Jesuit University in Rochester, New York; the Loyola Seminary Library (now defunct) in Shrub Oak, New York; Xavier High School, New York, New York; and St. Andrew-on-the Hudson, Poughkeepsie, New York. The Collections contain mostly 19th and early 20th century books that cover topics such as Jesuit history, missions, spiritual life, biography, and governance. There is a smattering of 18th works. The Collections are particularly rich in documenting primary sources for Catholic missions, especially those of the Jesuit order, and sundry other religious orders of both men and women. The language diversity reflected in the Collections are also peculiarly rich. While the majority of works in the Collections are in English, nearly 30% of the materials are in French. Materials in German, Italian, and Spanish are nearly 11%, 10%, and 9% respectively. There is a substantive run of titles from the monograph series, Orientalia christiana, and Orientalia christiana analecta issued from the Pontifical Institute for Oriental Studies in Rome.