Manuscripts.

I. At the Vatican. (a) Of the Sermons. (1) Codd.3835 and 6 are two volumes in Roman Character of a Lectionary of about the 8th century; the second volume contains the "Tome" (which in the 8th and 9th centuries used to be read in the Church offices before Christmas): (2) 3828, a parchment (10th century), also a lectionary: (3) 1195, a parchment folio (11th century), a lectionary containing inter alia some of Leo's homilies: (4) 1267, 8 and 9 of the same character (11th century): (5) 1270 contains the Sermon de Festo Petri cathedræ, (now xiv. in Migne's Appendix), from which Cacciari restored Quesnel's imperfect edition of it to its present state: (6) 1271 and 2 are also lectionaries: (7) 4222 in Lombardic characters (9th century), a lectionary: (8) 5451 in Roman characters (12th century), a lectionary: (9) 6450 parchment (12th century): a lectionary containing the sermon de Festo Petri cathedræ in the form found and printed by Quesnel; (10) 6451 similar: it contains sermons de Quadragesima and others: (11) 6454 similar.

(b) Of the Letters: these are mostly rather later (i.e. about 12th or 13th century): but (1) 1322 is of an older date, and contains besides the epistles, all the acts of the Council of Chalcedon: (2) 5759 is earlier than the 9th century; it used to belong to the monastery of S. Columban at Bobbio, and contains 31 letters: (3) 5845 is very ancient, and according to Cacciari, Lombardic: it contains 24 letters.

(g) Letters and Sermons together: of these there are nine collections in the Vatican, of which 548 and 9 contain the sermon de Absalom which is condemned by Cacciari. The Regio-Vaticanus codex 139 is a fine collection of Leo's works (12th century).

II. At other places: (1) The codex Urbinas 65 is thought to be a copy of the Regio-Vaticanus 139 made in the 14th century.

(2) Codex Grimanicus [14] is a ms. on which Quesnel lays great stress: Quesnel assigns it to the ninth century; it contains 107 letters, of which 28 had never been printed before Quesnel.

(3) The Thuanei; (a) 129 contains 123 letters: (b) 780 contains the Tome: (g) 729 contains the spurious de vocatione gentium and some epistles.

(4) The Corbeienses are old.

(5) The Taurinensis 29 D. iv. is a fine 13th-century ms. containing 52 letters.

(6) The Florentinus codex belongs to the 13th century also.

(7) Ratisbonensis 113 DD. AA., in the monastery of S. Emeramus, contains 72 letters: it is said to date from about 750 a.d.

(8) The two Bergonenses are of 12th century, and contain 12 sermons.

(9) Two Chigiani also of 12th century contain 4 sermons.

(10) The Padilironenses contain 9 sermons and the Tome.

(11) There are three Patavini, of which two contain the Tome.

(12) Vallicellani: these are a number of 11th or 12th-century codices.

There are also the Veneti, the Vercellenses, the Veronenses, &c.

N.B. The foregoing account is taken from Schönemann's Notitia Historico-Literaria (1794), and the translator has no means of knowing whether it is still correct (1890).