[sect. 3]
sperabam : an epistolary tense; cf. Intr. 84c.
ante : before Caesar's return from Spain, which took place in Sept., 45 B.C.
unius: i.e. Caesaris.
amicissimi: Caesar had shown his friendship for Servius by making him governor of Achaia.
vale: cf. Intr. 62.