Note 151 — Chapter LVI · FROM THE FESTIVAL OF OLYMPIAD NINETY DOWN TO THE BATTLE OF MANTINEIA.
Reading edition
Thucyd. v, 116. Λακεδαιμόνιοι, μελλήσαντες ἐς τὴν Ἀργείαν στρατεύειν ... ἀνεχώρησαν. Καὶ Ἀργεῖοι διὰ τὴν ἐκείνων μέλλησιν τῶν ἐν τῇ πόλει τινὰς ὑποτοπήσαντες, τοὺς μὲν ξυνέλαβον, οἱ δ’ αὐτοὺς καὶ διέφυγον.
I presume μέλλησιν here is not used in its ordinary meaning of loitering delay, but is to be construed by the previous verb μελλήσαντες, and agreeably to the analogy of iv, 126—“prospect of action immediately impending:” compare Diodor. xii, 81.