the Opus Majus, the Opus Minus, and the Opus Tertium, were sent to the Pope within fifteen or eighteen months after the arrival of the papal mandate[1337]. ‘Such a feat’ says Brewer, ‘is unparalleled in the annals of literature.’ The Pope probably used his influence in behalf of Roger, as the latter seems to have returned to England about this time and to have been freed from annoyance[1338]. The works sent to Clement he regarded merely as handbooks; at the same time that he was writing them, he was engaged on a larger work which was to embrace the whole range of sciences as then understood[1339]. He was working at this in 1271[1340]. His attacks on all classes, including his own Order, became even more violent than hitherto. In 1277 and 1278 synods were held at Paris and Oxford to condemn erroneous doctrines. The repressive movement extended to the Franciscans; in 1278, Jerome of Ascoli, the Minister General, held a Chapter at Paris, and among other friars Roger Bacon was condemned ‘_propter quasdam novitates_[1341].’ He is believed to have remained in prison for fourteen years. Jerome of Ascoli, who became Pope Nicholas IV in 1288, died in 1292. Raymond Gaufredi, a man of liberal views, was elected General in 1289, and released many friars who had been imprisoned for their opinions by his predecessors. In 1292 he held a General Chapter at Paris, and it is probable that among the friars here set free was Roger Bacon[1342]. It is certain that the last work of Roger’s of which we have any notice was written in 1292[1343]. The date usually assigned for his death (1294) is a pure conjecture[1344]. John Rous says that he was buried among the Friars Minors at Oxford[1345]. Such then is the chronological outline of his life, as far as it can be ascertained. A list of his works will be more useful than a short account of his character or philosophy. =Roger Bacon’s Works= were neglected and regarded with a pious horror in the Middle Ages[1346]. The result is that many of those which have survived at all have reached us in a fragmentary state. ‘It is easier,’ said Leland, ‘to collect the leaves of the Sibyl than the titles of the works written by Roger Bacon.’ The difficulty has to a considerable extent been removed by Mr. Brewer’s valuable preface to the _Opera Inedita_, and by the labours of M. Charles. The following account of Roger Bacon’s works is based chiefly on these two writers. Some additions have been made and some rearrangement attempted. Miscellaneous works, lectures, &c., probably early:-- _Computus naturalium_, an astronomical treatise, is the earliest work of Bacon’s to which a date can be assigned; it was written A. D. 1263-4. _Inc._ ‘Omnia tempus habent.’ MSS. British Museum: Royal 7 F viii. fol. 99-191 (sec. xiii). Oxford: University College, 48. Douai 691, § 2. Summary printed by Charles, _Roger Bacon_, pp. 355-8.