This delegation arrived to him at the time when, after Pascha, he returned from Jerusalem to Caesarea.
Blastus, the king's chamberlain: judging from the Roman name, one may suppose that the king's chamberlain was a Roman, perhaps brought by the king from Rome, where he had lived before ascending the throne.
The king's chamberlain, praefectus cubiculi: the word originally meant the chief servant attached to the person of the king, a chamberlain. Later it meant a high dignitary attached to the king, the keeper of his treasures.
Compare Acts 8:27. Such a person was ordinarily very influential and powerful.
They asked for peace: there was no war, and therefore those sent asked for the preservation of peace. They wished peaceful relations between the king and these Phoenician cities not to be interrupted.
In his anger, the king could have broken these relations and done great harm to these cities. He could hardly have declared war on them, since they stood under Roman protection, and Agrippa himself was a vassal of the Roman emperor.
But he could have inflicted enormous damage on their trade by closing his harbors to them.
Their country was fed from the king's country, since the Phoenicians generally received most of their grain from Palestine. They themselves were chiefly a mercantile nation, not an agricultural one.
Commercial relations with the regions of Herod's kingdom were also very profitable for them.