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B = Codex Parisinus 1431 formerly Colbert. 621, Reg. 2280; E in Burton, parchment, 11th or 12th century. In quaternions of 8 leaves. The manuscript is similar in format and ductus to the Mazarinaeus A and, like it, is written very neatly and correctly. Improvements are rare; beyond the first hand, I have found an old one, very similar to the scribe, and a young one. Compared by me in Rostock. The Church History is on fol. 1^r—267^r; the appendix on p. 796, 797 and the book on the Palestinian Martyrs are missing. Regarding the attached piece from Vita Constantini 2.24—42, which begins on fol. 267^v (269^v according to Heikel) and ends on fol. 273^r (275^r according to Heikel), cf. Heikel in Vol. I, XIII and my note on p. 904. One leaf is missing between fol. 193 and 194, and one between fol. 232 and 233; cf. the apparatus on p. 670, 790, 794.
Besides the Church History (KG), the manuscript contains the so-called Laus Constantini Praise of Constantine in three separate sections: 1. fol. 273^v–274^r, p. 195.1–196.13, under the heading Prologue to the Praises of Constantine; 2. fol. 274^v–297^r, p. 196.14–223.22, under the heading Eusebius of Caesarea to the Emperor Constantine, the Tricennalia and with the subscription Tricennalia; 3. fol. 297^v–326^r, p. 223.23–259.32, with the heading and subscription Eusebius of Caesarea, Basilikos Imperial Oration. On fol. 326^v, heavily damaged by erasures, stands the subscription in uncial letters: "This book of the Church History of Eusebius of Caesarea was written during... of the most devout hegumen of... by the hand of Sergius, the least..."
Copied from B are:
1. b = Codex Marcianus [Venice] 339 M in Heikel, bombycine, 14th century. The manuscript came from Athos cf. the subscription in Heikel, p. XV to the library of Cardinal Bessarion. It ^1 con-
1) I owe to the kindness and diligence of Silvio Giuseppe Mercati an exact description and investigation of the manuscript, through which my own notes have been substantially supplemented.