It was in thoes days, the custom of the great king to send to the enemy of his enemy a bag of gold and a dagger with no message needed as the point was clear. Demosthenes admitted publicly to having accepted gold from Darius III just before the assassination of Philip. Put two and two together. It should have been no great trouble to dupe the hapless Pausanias with gold and the promise of aid and shelter after the deed and there would be no need at all to make good the promises of aid. Better to let the fool be silenced forever. The only place in the world that Pausanias could have escaped the vengence of Macedon would have been Persia. Anyone would have known that.