Th.—The edition of Chaucer's Works by Wm. Thynne, printed at London by Thomas Godfray in 1532. This is the first edition in which the Treatise on the Astrolabe appeared; it begins at fol. ccxcviii, back. The Conclusions in Part ii. are in the order following, viz. 1-12, 19-21, 13-18, 22-40; after which come 41-43, and 41a-42b. This order does not agree precisely with that in any MS. now extant, with the exception of I., which imitates it. It has some corrupt additions and exhibits many grave errors. All later editions, down to Urry's in 1721, contribute no new information. The few slight alterations which appear in them are such as could have been made without reference to MSS. at all.
§ 19. Remarks on the Classes of the MSS. On comparing the MSS., it at once appears that they do not agree as to the order of the Conclusions in Part ii. The MSS. A., B., C. (which are unquestionably the oldest), as well as E., F., G., and P., adopt the order which appears in this edition, but which has never appeared in any previous edition. In all other editions we find the three sections 19-21 made to precede sections 13-18. Now we might here appeal to authority only, and say that the order in the oldest MSS. ought to be preferred. But it so happens that we can appeal to internal evidence as well, and there are two considerations which shew that the oldest MSS. are certainly correct. These are as follows. In the first place, sect. 18 amounts to finding the degree of the zodiac which souths with any star, and begins with the words 'Set the centre of the sterre upon the lyne meridional'; whilst sect. 19 amounts to finding the degree of the zodiac that rises with any star, and begins with the words 'Set the sentre of the sterre upon the est orisonte.' Clearly, these Conclusions are closely linked together, and one ought to follow the other. But, in all the editions, this continuity is broken. In the second place, the rubric of sect. 21 is—'To knowe for what latitude in any regioun,' &c.; whilst that of sect. 22 is—'To knowe in special the latitude of oure countray,' &c. Clearly, these Conclusions are closely linked, and in their right order. But, in all the editions, this continuity is again broken; and we have this absurd result, viz. that a proposition headed—'To knowe the degrees of the longitudes of fixe sterres' is followed by one headed—'To knowe in special the latitude of oure countray.' Hence we are enabled to draw a line, and to divide the MSS. into two classes; those in which the order of sections is correct, and those in which it has suffered misplacement, the number in each class being much the same. This gives us the following result.
First Class. A., B., C, (probably D.,) E., F., G., P.
Second Class. H., I., K., L., M., N., O., R.; to which add Th.
But this division immediately leads to another very curious result, and that is, a certain lack of authority for sections after the fortieth, which ends on p. [223].
A. ends with an incomplete sentence, in sect. 40, with the words—'howre after howre.' B., C. end exactly at the same place.
E. ends sect. 40 with the same words; and, after this, has only one additional section (46), which is, in my opinion, spurious; especially as it does not appear in Messahala, of which more anon.
D., F., and G. all fail at an earlier point.
In none of the first-class MSS. (excepting P., which terminates with section 43) is there a word about umbra recta or umbra versa.
Even in the second class of MSS., we find H. breaking off at sect. 36, and K. at sect. 35; so that the sections on the umbrae rest only on MSS. I. (obviously an edition, not a transcript), L., M., N., O., P., and R. Putting aside the first of these, as being 'edited,' we have but six left; and in the first four and the last of these we find that the additional Conclusions appear in a certain order, viz. they insert 44 and 45 (on the 'mene mote') between three sections 41-43 on the 'umbrae' and five other sections 41a-42b on the same.