[521] Corpus Christi 263, fols. 166-7.
[522] Professor Haskins’ account of Roger’s life and works in his “Introduction of Arabic Science into England,” EHR (1915), XXX, 65-8, supplements and supersedes the article in DNB. Where I do not cite authorities for statements that follow in the text, they may be found in Haskins’ article.
[523] BN 10271, fol. 203v, quoted by Haskins (1915), p. 67. It seems to me, however, from an examination of the MS that Roger’s work concludes at fol. 201v, “Explicit liber,” and that this extract, “Ad habendam noticiam quis est vel erit dominus anni,” at fol. 203v, may be another matter.
[524] The initial letters of the table of contents form the acrostic, “Gilleberto Rogerus salutes H. D.”
[525] Printed in part by T. Wright, Biograph. Lit., p. 90 et seq.
[526] Digby 40, fol. 65, “Prefatio magistri Rogeri Infantis in compotum”; Haskins conjectures that Infantis may be a corruption for Hereford, or an equivalent for the iuvenis of the text; but Leland took it as Roger’s surname and called him Roger Yonge.
[527] Haskins is not quite accurate in saying (p. 67), “Royal MS 12 F, 17 of the British Museum, catalogued as ‘Herefordensis iudicia’ is really the treatise of Haly, De iudiciis,” for while the MS does contain Egidius de Tebaldis’ translation of Haly de iudiciis in a fourteenth century hand, on its fly-leaves are inserted in a fifteenth century hand both “iudicia Herfordensis” and a treatise on conjunctions of John Eschenden. Moreover, all these items are listed both in the old and the new catalogue of the Royal MSS.
[528] BN 10271, written in 1476, 1481 A. D., etc., fol. 179-, “In nomine dei pii et misericordis Incipit liber de divisione astronomie atque de eius quatuor partibus compositus per clarum Rogerium Herfort Astrologum.” The text proper opens: “Quoniam principium huic arti dignum duximus de quatuor eius partibus agamus.”
[529] This chapter is almost exactly like the first chapter of the first book of the printed edition of John of Seville’s Epitome totius astrologiae, and the general plan of the two treatises and their emphasis upon experience are very similar, although there also seem to be considerable divergences. For instance, the next chapter in the printed text is different, “De coniunctionibus planetarum, quae sunt numero c.xx.” Unfortunately I have not been able to compare edition and manuscript in detail. Both may represent texts of late date which have rearranged or added variously to the original, whether it be by John or Roger. Or both John and Roger may have taken similar liberties with a common Arabic source. John’s authorship appears to be supported by more MSS than Roger’s.
[530] Caps. 7 and 8, at fol. 182r-v, are, “De proprietate signorum in qualibet terra” and “De cognitione de bono anno vel malo.”