The resemblance of Th. and G. is very close; however, each sometimes corrects _small_ faults in the other, and the collation of them is, on this account, frequently helpful. Both are remarkable for an extraordinary misarrangement of the material, in which respect they closely agree; and we are enabled, from this circumstance, to say, definitely, that the C-portion of O. (i. e. their common original) was written (doubtless on vellum) in quires containing 8 leaves (or 16 pages) each, there being, on an average, 24 lines upon every page. Of these quires, the fourth had its leaves transposed, by mistake, when the MS. was bound, in such a manner that the _middle_ pair of leaves of this quire was displaced, so as to come next the two _outer_ pair of leaves; and this displacement was never suspected till of late years, nor ever (so far as I am aware[191]) fully appreciated and explained till now[192]. This displacement of the material was first noticed in Bell's edition, where the editor found it out by the simple process of comparing the English 'translation' with the French 'Roman'; but he gives no account of how it came about. But a closer investigation is useful as showing how exactly 'Th.' and 'G.' agree in following an original displacement in 'O.', or rather in the still older MS. from which the C-portion of O. was copied. In the fourth sheet (as said above), the pair of middle leaves, containing its 7th, 8th, 9th, and 10th pages (G, H, I, K, with the contents recorded in note 2 below) was subtracted from the middle of the quire, and placed so that the 7th page (G) followed the 2nd (B), whilst at the same time, the 10th page (K) came to precede the 15th page (P). The resulting order of pages was, necessarily, A, B, G, H, C, D, E, F, L, M, N, O, I, K, P, Q; as is easily seen by help of a small paper model. And the resulting order of the lines was, accordingly, 6965-6988, 6989-7012, 7109-7133, 7134-7158, 7013-7036, 7037-60, 7061-84, 7085-7108, 7209-7232, 7233-7256, 7257-7280, 7281-7304, 7159-7183, 7184-7208, 7305-7328, 7329-7352; or, collecting the successive numbers, ... -7012, 7109-7158, 7013-7108, 7209-7304, 7159-7208, 7305, &c. And this is precisely the order found, both in Th. and G. We see further that the fourth and last quire of this C-portion of O. consisted of 7 leaves only, the rest being torn away. For 7 leaves containing 48 lines apiece give a total of 336 lines, which, added to 7352, make up 7688 lines; and, as 10 of the pages seem to have had 25 lines, we thus obtain 7698 lines as the number found in O. The A-portion of O. was probably copied from a MS. containing usually 25 lines on a page, and occasionally 26. Four quires at 50 lines to the leaf give 32 × 50, or 1600 lines; and 2 leaves more give 100 lines, or 1700 lines in all. If 5 of the pages had 26 lines, we should thus make up the number, viz. 1705. Of the B-portion we can tell nothing, as we do not know how it was made to join on.