SIGLA Abbreviations for the manuscripts used in the edition

A = Codex Parisinus graecus 1807
A² = The same, after correction (apparently by the same hand)
A³ = Hand of the 12th century (apparently)
a = Hand of Constantine (14th century)
a² = Another hand of the 14th century
a³ = Hand of the 15th–16th century
L = Codex Laurentianus lxxx. 17 (Stallbaum, Flor. δ)
O = Codex Vaticanus graecus 1 (Bekker's Ω)
F = Codex Vindobonensis 55, suppl. phil. Gr. 39
Y = Codex Vindobonensis 21 (Bekker's Υ)
Z = Codex Parisinus 3009
scr. recc. = Readings from books written after the Renaissance original: "litteras renatas"