John Burghill served as the king's confessor until 1396, when he was made Bishop of Llandaff.
St. Stephen's Chapel, Westminster Palace
Richard G. Davies, "The Attendance of the Episcopate in English Parliaments, 1376-1461," Proceedings of the American Philosophical Society 129, no. 1 (1985): 30-81.
C.F.R. Palmer, "Fasti Ordinis Fratrum Praedicatorum: The Provincials of the Friar-Preachers, or Black Friars, of England," Archaeological Journal 35, no. 1 (1878): 134-165: 155.
"John Burghill", Wikipedia
"Chapel goods," Richard II's Treasure
"Kings at St Stephen's," UK Parliament Living Heritage
Margaret K. Smith