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Before heading off to a month of Halloween posts here's something a bit more scholarly. The topic is one that I'd never thought about but once heard seems so obvious. It's a doctoral dissertation (the author later taught at Princeton) so a bit short but the advantage is that it doesn't meander instead getting right to the point - how Alexander spoke to his troops, Herodotus' use of an interpreter, translation in courts, sign communication and the ever-popular barbarian languages.
