Most readers are quite likely to have some basic information about St. Cyprian (d. 258), St. Ambrose (ca. 339-397) and St. Augustine (354-430). Fewer readers are likely to be equally informed about St. Anthony (251?-356), St. Paul the Hermit (d. ca.340), St. Hilarion (ca. 291-371) and St. Epiphanius (438/439-496/497). Perhaps hardly any reader is acquainted with the holy monk Malchus, presumably a contemporary of St. Jerome (ca. 342-420) and son of...