Note 183:1 — Chapter X · RISE OF THE PAPACY—Continued
Reading edition
Thatcher and McNeal, Source-Book of Med. Hist., No. 35. Nic. and Post-Nic. Fathers, 2d ser., xii., contains his life and letters. See sermon by Leo I. on Peter's leadership in Robinson, Readings, i., 69; Orr, Source Book, § 10.