(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  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).
 Grimanus, from whom this Codex is named, was Cardinal of S. Mark, &c., in the 16th century.