According to John Bale, Scriptorum illustrium maioris Brytanniae ... Catalogus (Basel, 1559), 450, Wyclif first appeared as Christ's great-hearted champion in 1360. No other source has been found saying this - John Foxe states only that Wyclif `flourished A.D. 1371' - arousing the suspicion that Harrison took the Catalogus as his basic source but `revised' it to provide a date that fitted into his own very precise chronometry. In fact there is no evidence that Wyclif `began to preach the gospell' in 1361 - he became involved in political controversy in 1377, while his opinions were first condemned as heretical only around the beginning of 1381 (developments recorded under those years in the Historie of England).