Pausanias Description of Greece 1.20.5

[5] There was an Athenian, Aristion, whom Mithridates used as his envoy to the Greek [ Hellēnides] cities. He persuaded the Athenians to join Mithridates rather than the Romans, although he did not persuade all, but only the common-people [ dēmos] and, in particular, the most turbulent part of the common-people [ dēmos]. But those Athenians who were of any account [ logos] fled to the Romans of their own accord. In the engagement that followed, the Romans won a decisive victory; Aristion and the Athenians fled and were pursued right into the city [of Athens itself], while Arkhelaos and the barbarians were pursued right into the [harbor city of] Peiraieus. This Arkhelaos was another general of Mithridates, whom earlier than this the Magnesians who inhabit [ oikeîn] the region of Mount Sipylos wounded when he raided their territory, killing most of the barbarians as well. So, Athens was besieged.