Daniel L. Schwartz and Nathan P. Gibson (eds.), "Brooks, A Collection of Letters of Severus of Antioch, fasc. 1" in last modified October 27, 2015, http://syriaca.org/bibl/670 E. W. Brooks Letters I to LXI E. W. Brooks A Collection of Letters of Severus of Antioch, from Numerous Syriac Manuscripts http://syriaca.org/bibl/677 Firmin-Didot et cie Paris 1919-1920 2 fasc I R. Graffin F. Nau Tomus Duodecimus http://syriaca.org/bibl/679 Firmin-Didot et cie Paris 1919 II 164-342 R. Graffin F. Nau Patrologia Orientalis 12 http://syriaca.org/bibl/670