[sect. 2]
Camillo: C. Furius Camillus, a legal friend of Cicero.
ad summam, in short; a frequent colloquial phrase. Cf. Fam. 8.14.4; Att. 14.1.1; Petron. 2, 37, 45, etc.
Labienus, etc.: cf. Fam. 16.12.4 (Caesar) maximam autem plagam accepit, quod is qui summam auctoritatem in illius exercitu habebat, T. Labienus, socius sceleris esse noluit; reliquit illum et nobiscum est, multique idem facturi esse dicuntur; cf. also Att. 7.13.1 and Caes. B.C. 8.52; B. C. 3.13.
Piso: L. Calpurnius Piso Caesoninus, whose daughter Calpurnia was the wife of Caesar. Piso was consul in 58 B.C.
, and joined Cicero's enemies in helping to banish him. Cicero retaliated in the Or. in Pison.
Rufus: probably Mescinius Rufus; cf. Ep. XXXIX.3n.