Letter coll=F:book=16:letter=6 Letter XL: ad familiares 16.6
Actium, Nov. 7, 50 B.C.
QQ. (=Quinti duo): i.e. the brother and nephew of Cicero. Cf. the salutations in Ep. XXXIX. and XLII.
[sect. 3]
tertiam: the other two were Ep. XXXIX. and Fam. 16.5.
cui darem: for the lack of a postal system among the Romans, see Intr. 64.