On this side of the Latin Library the number of books has risen to 360 as against 313 of the previous catalogue. In the Greek Library there are similarly two shelves to each seat, and the total number of volumes is 407 as against 400. The account of the Inner Library begins as follows: In secretiori bibliotheca In iij^o. scanno supra. [16] " " infra [17] " " inferius siue sub infra [21] Three of the seats have three shelves; the rest two; and the total number of volumes has become 222 as against 190: or, an average of 37 to each seat. The _Bibliotheca pontificia_ is introduced with the following heading: In intima et ultima secretiori bibliotheca ubi libri sunt pretiosiores. Each seat has two shelves, and the total number of volumes is 277 as against 259 in 1481. Among the MSS. occurs "Virgilius antiquus litteris maiusculis"--no doubt the Vatican Virgil (_Codex romanus_), a volume which fully justifies its place among those termed _libri pretiosiores_. This catalogue closes with the following sentence: Finis totius Bibliothece Pontificie: viz. omnium scamnorum tam Latinorum quam Grecorum in prima, secunda, tertia, et quarta eius distinctione et omnium omnino librorum: exceptis armariis et capsis: et iis libris, qui Graeci ex maxima parte, in scabellis parieti adherentibus in intima ac penitissima Bibliothece parte sunt positi. Deo Laudes et Gratias. The increase between 1481 and 1512 in the number of volumes in the parts of the Library defined in the above catalogue will be best understood from the following table, which shews that 131 volumes had been added in 31 years. 1481 1512 Latin Library 743 817 Greek " 400 407 Bibliotheca secreta 190 222 " pontificia 259 277 ---- ---- Total 1592 1723 Another catalogue, unfortunately without date[396], but which has every appearance of belonging to the same period, notes the rooms as the _Bibliotheca magna publica_, i.e. the Latin and Greek Libraries taken together, the _Bibliotheca parva secreta_, and the _Bibliotheca magna secreta_. The catalogue drawn up by Zenobio Acciaioli, 12 October, 1518[397], offers no peculiarity except that in the Inner Library each seat is noted as having three rows of books, thus: In primo bancho bibliothece parve secrete Infra in secundo ordine " tertio " [Illustration: Fig 99. Interior of the Library of Sixtus IV., as shewn in a fresco in the Ospedale di Santo Spirito, Rome. From a photograph taken by Danesi.] We may now proceed to arrange the Library in accordance with the information derived from the Accounts and the catalogues, compared with the ground-plan (fig. 98).