(He congratulates him on his appointment, exhorts him to firm but gentle government, and advises him frequently to consult the Apostolic See. Undated, but no doubt sent about the same time as XL.)
Reproduced in full. Translation: Nicene and Post-Nicene Fathers, series 2, vol. 12 (Schaff and Wace, 1895), public domain (Public domain).
