Manuscripts dating from the early 1960s, having to do with American Catholic Thought on Social Questions , an anthology edited by Abell and published posthumously in 1968; including drafts of his introduction, bibliography, notes on essayists included in the anthology, photocopies of essays included, and galley proofs.

Correspondence, 1912-1913 and 1922-1938; drafts of publications, articles and notes used in his publications; reviews of his writings; his subject files on such topics as evolution, the Bible, and New Testament social teachings; and printed matter such as Hand der Neutestamentlichen Textkritik (1923).

In English, Greek, and German.