 Hughes' other special interest was in medieval philosophical logic, where his main projects were the preparation of philosophical commentaries on Latin manuscripts of John Buridan and Paul of Venice, as well as English translations of the originals.He was also a priest in the Anglican (Episcopal) Church, having been ordained in Bangor Cathedral in 1950.At that time there was a need for clergy who could conduct services in both Welsh and English, so the then Bishop of Bangor ordained several men whom he considered suitable, but who had not had the usual theological training.