One point deserves particular attention. It not only contains the Conclusions of Part ii. in the right order, but continues it without a break to the end of Conclusion 43 (p. [225]); at the end of which is the colophon—Explicit tractatus astrolabii.
§ 17. Q.—MS. Ashmole 393, in the Bodleian Library; on paper. Of little importance.
R.—MS. Egerton 2622, in the British Museum. A neat MS., but without diagrams. Contains: Part I. (except 15-23); Part II. §§ 1-12, 19-21, 13-18, 22-35, 41-43, 44, 45; 41a, 41b, 42a, 43a, 42b, 36, 37. Thus it has all the additional sections except 46; but 38-40 are missing. MS. L. contains the same sections in the same order; see § [12].
S.—MS. Addit. 29250. A poor MS., but remarkable for containing the scarce section no. 46; of which there is but one other copy, viz. that in MS. E (§ [6]); cf. pp. [240], [241].
T.—MS. Phillipps 11955; at Cheltenham. On vellum; 31 leaves; said to be of the fourteenth century, which is improbable.
U.—MS. Bodley 68. Imperfect; ends at Part ii. § 36.
W.—MS. E Museo 116, in the Bodleian Library. A mere fragment.
X.—A MS. at Brussels, no. 1591. See F. J. Mone, Quellen und Forschungen, (Aachen, 1830); pp. 549-551.
§ 18. Of the above MSS., Mr. Brae describes H., I., and L. only, and does not seem to have made use of any others. Mr. Todd, in his Animadversions on Gower and Chaucer, p. 125, enumerates only four MSS., which are plainly A., P., F., and G. The rest seem to have escaped attention.
In addition to the MS. authorities, we have one more source of text, viz. the Editio Princeps, which may be thus described.