And when Deinarchus the Corinthian denounced him for this, Cassander1
flew into a rage and slew the son of Demades as he stood close by his father's side, and then ordered that Demades should be likewise killed. Demades was now learning amid his extremest misfortunes that traitors sell themselves first, a truth of which Demosthenes had often assured him, but which he would not believe.
And so, Sosius,2
thou hast the promised Life of Demosthenes, drawn from such written or oral sources as I could find.