Crump, Henry (a.1350–p.1401), theologian and scholar, was a native of the Anglo-Irish lordship who joined the Cistercian house of Baltinglass before being sent to Oxford, where he gained the degree of D.Th. and probably served as the master of the Cistercian students in the university. He emerged as a staunch critic and opponent of John Wyclif and preached a sermon against him in the mid 1370s which does not survive, though Wyclif's reply does. Crump was one of twelve doctors of the university to sign the condemnation of Wyclif's teachings on the eucharist in 1381. In June 1382, when the university was controlled by a pro-Wyclif administration, he caused further tensions by calling the Wycliffites ‘Lollards’ and was forced out of his place in the university, despite a royal writ (dated 14 July 1382) that ordered him to be restored.
Crump then returned to Ireland, but was soon embroiled in controversy there as he came to champion the anti-mendicant cause within the Irish church. He was condemned for heresy by William Andrew (d. 1385), bishop of Meath (himself a Dominican), on 18 March 1385. Seven of the counts against him related to his anti-mendicant stance, but one accused him of a Wycliffite stance on the eucharist, indicating that Crump had changed his opinions somewhat since 1382. He returned to Oxford by 1391, where nothing was said about the charges in Ireland until he was again summoned to account for his teachings. On 20 March 1392 he was barred from teaching in the university, and left by 3 May. His trial was held at Stamford before the archbishops of Canterbury, York, and Dublin (28 May 1392), and Crump was forced to abjure his position. His previous conviction for heresy only came to light on 11 June 1392, too late to affect the proceedings.
After the trial he returned to Ireland, where he again became embroiled in conflicts with the mendicant orders; he was singled out with John Colton (qv), archbishop of Armagh, on 28 August 1401, for preaching against an indulgence granted to the Franciscans, and was ordered to desist. Bale credits him with writing three books, two against the mendicant orders and a history of the monastic orders, but none of these survive.