다마스쿠스의 니콜라우스, Life of Augustus 31. It has been speculated that Agrippa was among the negotiators who won over Antony's Macedonian legions to Octavian, but there is no direct evidence for this; see Reinhold, p. 16.
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Velleius Paterculus 2.69.5; Plutarch, Life of Brutus27.4.