According to Joyce Reynolds, inscriptions at Aphrodisias in Asia Minor are compatible with dating the Treaty of Misenum to the second half of August, 39 BC.
[3] Even after that strife was temporarily abated by the Treaty of Brundisium (September 40 BC), there was still trouble from the pirate/commander Sextus Pompey, who, operating out of his base in Sicily, was cutting off essential food supplies from Egypt to Rome, causing considerable distress throughout Italy.
14.387/14.14.5) says that Herod, during his time of meeting with Octavius, Mark Antony, and the Roman Senate, was in Rome only seven days, after which he hurriedly left for Syria/Phoenicia, where he met Ventidius, who was already there (Ant.
Herod was in a hurry to sail from Rome immediately after his appointment by the Senate, not only to raise an army against his opponent Antigonus, but also to relieve his fiancée Mariamne and his other relatives who were besieged in Masada.
Herod's appointment as de jure king by the Roman Senate must have occurred after the Treaty of Misenum (August 39 BC), not a year earlier as maintained by Schürer.