Pausanias Description of Greece 1.20.5

[5] There was an Athenian, Aristion, whom Mithridates employed as his envoy to the Greek cities. He induced the Athenians to join Mithridates rather than the Romans, although he did not induce all, but only the lower orders, and only the turbulent among them. The respectable Athenians fled to the Romans of their own accord. In the engagement that ensued the Romans won a decisive victory; Aristion and the Athenians they drove in flight into the city, Archelaus and the foreigners into the Peiraeus. This Archelaus was another general of Mithridates, whom earlier than this the Magnetes, who inhabit Sipylus, wounded when he raided their territory, killing most of the foreigners as well. So Athens was invested.

[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.