in all the oldest copies. By way of illustration, I would point out that this is not the only difficulty, for the Conclusions about astrology ought certainly to have been reserved for Part v. These are Conclusions 36 and 37, which concern the 'equaciouns of houses'; and this is probably why, in three of the MSS. (viz. L., N., and R.), these two conclusions are made to come _at the end of the Treatise_. There is nothing for it but to accept what we have, and be thankful. § 24. EXTANT PORTION OF THE TREATISE. If, then, the questions be asked, how much of the Treatise has come down to us, and what was to have been the contents of the missing portion, the account stands thus. Of Part i. we have the whole. Of Part ii. we have nearly all, and probably all that ever was written, including Conclusions 1-40 on astronomical matters, and Conclusions 41-43 on the taking of altitudes of terrestrial objects. Possibly Conclusion 46 is to be added to these; but Conclusions 41_a_-42_b_ are certainly spurious. Part iii. probably consisted entirely of tables, and some at least of these may very well have been transmitted to little Lewis. Indeed, they may have been prepared by or copied from Nicholas of Lynn and John Somer, before Chaucer took the rest in hand. The tables were to have been (and perhaps were) as follows:-- 1. Tables of latitude and longitudes of the stars which were represented on the 'Rete' of the Astrolabe. Specimens of such tables are found in MSS. 2. Tables of declinations of the sun, according to the day of the year. 3. Tables of longitudes of cities and towns. 4. Tables for setting clocks and finding the meridian altitudes (of the sun, probably). Such tables as these are by no means lost. There are MSS. which contain little else, as e.g. MS. Hh. 6. 8 in the Cambridge University Library. The longitudes of towns are given in MS. Camb. Ii. 3. 3, at fol. 214_b_. Again, in MS. F. 25, in St. John's College Library, Cambridge, we find tables of fixed stars, tables of latitudes and longitudes of towns, tables of altitudes of the sun at different hours, and many others. Part iv. was to explain the motions of the heavenly bodies, with their causes. This was probably never written, though there is an allusion to it in Part ii. § 11, l. 12. It was also to contain a table to shew the position of the moon, according to an almanac; and such a table is given in the St. John's MS. above mentioned, and in MS. Camb. Ii. 3. 3, at fol. 143. This was to have been followed by a canon, and an explanation of the working of the Conclusion--'to knowe with which degree of the zodiac that the mone ariseth,' and 'the arising of any planete,' &c. The canon is partly accounted for, as regards the planets at least, by sections 44 and 45, and the 'Conclusion' by section 40.