He was appointed the bishop of the Diocese of Dromore by Pope Gregory XII on 30 December 1407 and was consecrated sometime before 11 November 1408.[1] According to some publications, he was recorded as Richard Messing and which said he died in 1409.[2][3] It may be there is some confusion with Richard Misyn, O.Carm., probably a later bishop of Dromore.[4]
Cotton, Henry (1849). The Province of Ulster. Fasti Ecclesiae Hiberniae: The Succession of the Prelates and Members of the Cathedral Bodies of Ireland. Vol. 3. Dublin: Hodges and Smith.
Fryde, E. B.; Greenway, D. E.; Porter, S.; Roy, I., eds. (1986). Handbook of British Chronology (3rd, reprinted 2003 ed.). Cambridge: Cambridge University Press. ISBN0-521-56350-X.