Historian, archivist, social activist, and Roman Catholic priest, Browne taught at Catholic University of America (where he also served as University Archivist); St. Joseph's Seminary, Yonkers, N.Y.; Cathedral College; and Rutgers University. He was active in community affairs in New York and Paterson, N.J. His primary research interests were John Hughes, first archbishop of New York, and labor and church history.

Proofs, photographs, photostatic copies, and other printed materials of Roscoe. Included are proofs and illustrative materials for his book The Web Of Conspiracy; The Complete Story Of The Men Who Murdered Abraham Lincoln, and a printed copy of his book, Only In New England, a book of crime fiction.