This library is 189 feet long, by 51 feet wide[354]. In it are 48 seats (_bancs_), and in each seat 4 shelves (_poulpitres_) furnished with books on all subjects, but chiefly theology.... The building that contains the said library is magnificent, built of stone, and excellently well lighted on both sides with five large windows, well glazed. As there were so many as 48 bookcases, that is, 24 on each side, the bookcases were evidently spaced without reference to the lateral windows, which were probably raised high above the floor. The catalogue, from which I have already quoted the verses commemorating the building of the library, contains much useful information respecting the arrangement of the books. The verses are succeeded by the following introductory note: Repertorium omnium librorum in hac Clarevallis biblioteca existentium a fratre Mathurino de cangeyo eiusdem loci monacho non sine magno labore editum. Lege Pro intelligentia presentis tabule seu Repertorii, sciendum est quod a parte aquilonari collocantur libri quorum litere capitales nigre sunt, quorum vero rubre a parte australi. Et omnes in ea ordine alphabetico scribuntur. Utriusque autem partis primum analogium per litteram A signatur, secundum per litteram B, tercium per litteram C, quartum per litteram D, quintum per litteram E. Et consequenter cetera analogia per sequentes litteras alphabeticas. Quodlibet autem analogium quatuor habet partes, quarum prima signatur per litteram A, secunda per B, tercia per C, quarta per D. Prime partis primi analogii primus liber signatur per A. a. 1, secundus per A. a. 2, tercius per A. a. 3, et consequenter. Secunde partis primus liber signatur per A. b. 1, secundus per A. b. 2; et de consequentibus similis est ordinatio. Tercie partis primus liber signatur per A. c. 1, secundus per A. c. 2; et consequenter. Quarte partis primus liber signatur per A. d. 1, secundus per A. d. 2; et consequenter. [In this way five "analogia" are enumerated.] Et eadem est disciplina et ordinacio de ceteris analogiis prout habetur in novissimo quaternione eiusdem tabule, immo et in fronte cuiuslibet analogii in tabella eidem appendente. Hanc tabulam seu repertorium scripsit quondam frater Petrus mauray de Arecis oriundus. Vivus vel defunctus requiescat in bona semper pace. Amen. The most important passage in the above note may be thus translated: Read For the right understanding of the present table or method of finding books (_tabule seu repertorii_), you must know that on the north side are ranged those books whereof the capital letters are black; on the south side those whereof the capital letters are red. All are set down in alphabetical order.