E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Dumb Ox of Cologne (The).
Thomas Aqunas (12241274), known afterwards as the Angelic Doctor or Angel of the Schools. Albertus Magnus, the tutor of the dumb ox, said of him: The dumb ox will one day fill the world with his lowing. He was born at Naples, but was a student in the monastery of Cologne.