§2.58.1τοῦ δ’ αὐτοῦ θέρους Ἅγνων ὁ Νικίου καὶ Κλεόπομπος ὁ Κλεινίου, ξυστράτηγοι ὄντες Περικλέους, λαβόντες τὴν στρατιὰν ᾗπερ ἐκεῖνος ἐχρήσατο ἐστράτευσαν εὐθὺς ἐπὶ Χαλκιδέας τοὺς ἐπὶ Θρᾴκης καὶ Ποτείδαιαν ἔτι πολιορκουμένην, ἀφικόμενοι δὲ μηχανάς τε τῇ Ποτειδαίᾳ προσέφερον καὶ παντὶ τρόπῳ ἐπειρῶντο ἑλεῖν.
During the same summer, Hagnon the son of Nicias and Cleopompus the son of Cleinias, who were fellow-generals with Pericles, took the army which he had used and campaigned immediately against the Chalcidians of Thrace and against Potidaea, which was still being besieged; and upon their arrival, they brought siege-engines against Potidaea and tried by every means to capture it.
§2.58.2προυχώρει δὲ αὐτοῖς οὔτε ἡ αἵρεσις τῆς πόλεως οὔτε τἆλλα τῆς παρασκευῆς ἀξίως· ἐπιγενομένη γὰρ ἡ νόσος ἐνταῦθα δὴ πάνυ ἐπίεσε τοὺς Ἀθηναίους, φθείρουσα τὴν στρατιάν, ὥστε καὶ τοὺς προτέρους στρατιώτας νοσῆσαι τῶν Ἀθηναίων ἀπὸ τῆς ξὺν Ἅγνωνι στρατιᾶς, ἐν τῷ πρὸ τοῦ χρόνῳ ὑγιαίνοντας.
But neither the capture of the city nor anything else went for them in a manner worthy of their preparation; for the plague, breaking out there as well, sorely distressed the Athenians, destroying the army, so that even the former Athenian soldiers, who had been healthy in the preceding time, fell sick from the army that had come with Hagnon.
Φορμίων δὲ καὶ οἱ ἑξακόσιοι καὶ χίλιοι οὐκέτι ἦσαν περὶ Χαλκιδέας.
Meanwhile, Phormio and his sixteen hundred were no longer in the neighborhood of the Chalcidians.
§2.58.3ὁ μὲν οὖν Ἅγνων ἀνεχώρησε ταῖς ναυσὶν ἐς τὰς Ἀθήνας, ἀπὸ τετρακισχιλίων ὁπλιτῶν χιλίους καὶ πεντήκοντα τῇ νόσῳ ἀπολέσας ἐν τεσσαράκοντα μάλιστα ἡμέραις· οἱ δὲ πρότεροι στρατιῶται κατὰ χώραν μένοντες ἐπολιόρκουν τὴν Ποτείδαιαν.
Accordingly, Hagnon returned with his ships to Athens, having lost by the plague one thousand and fifty out of four thousand hoplites in about forty days; but the former soldiers, remaining in their position, continued to besiege Potidaea.