The John Carroll, SJ Collection contains original and transcribed correspondence; two religious manuscripts; biographical notes and news clippings; and miscellaneous documents related to the first Roman Catholic bishop in the United States and the first archbishop of Baltimore. Of note are transcriptions of letters exchanged with Fr. Charles Plowden in folders 1, 2, and 6.

The Neil J. Twombly, SJ Papers contain notes and pedagogical materials for the study of Classics; spiritual writings; correspondence and photographs; a travel diary; and recognitions.