no English translation located. No published English translation of this text was located in the catalogues and series checked. Where only a non-English rendering or a translation of a daughter version exists, it is recorded below and does not close the gap. Treat this as a gap candidate, not as proof that no translation exists; the evidence names every source checked.
Why this is in the register
HOLLIS Primo search 'Psellos omnifaria doctrina' returns: Westerink's critical edition (Utrecht 1948), whose note states 'Text in Greek; editorial matter in English' - i.e. no translation - and an Italian translation (Mussini, Biblioteca medievale 5, Nardini 1990). No English translation appears. A scan of the series field across all 310 HOLLIS records returned for 'Psellos' shows no volume in the Fathers of the Church, Ancient Christian Writers or Popular Patristics series (checked 2026-11-13). The Notre Dame 'Michael Psellos in Translation' series was checked through HOLLIS and contains Mothers and Sons (2006), Psellos and the Patriarchs (2015) and On Literature and Art (2017), none of which translates this treatise. Status 'none' = no complete English translation located (checked 2026-11-13).
About 200 short chapters of philosophy and natural science, the closest thing Byzantium produced to a one-volume handbook of Greek learning; heavily used by later Byzantine writers. The Greek is printed in Migne, Patrologia Graeca 122 under the running head 'DE OMNIFARIA DOCTRINA' (verified by searching the OCR of that archive.org volume); Westerink 1948 supersedes it critically.