Verb katastellō (to quiet) in the Gospels-Acts

(Translation from NRSV with a few modifications for a more literal meaning)

Acts

19: 35But when the town clerk had quieted (katastellō) the crowd, he said, "Citizens of Ephesus, who is there that does not know that the city of the Ephesians is the temple keeper of the great Artemis and of the statue that fell from heaven?
19: 36Since these things cannot be denied, you ought to be having been quieted (katastellō) and do nothing rash.