Charles Ellicott Commentary Acts 21:34

"And some shouted one thing, some another, among the crowd: and when he could not know the certainty for the uproar, he commanded him to be brought into the castle." — Acts 21:34 (ASV)

Some cried one thing, some another.—We note the parallelism with the similar confused clamor at Ephesus (Acts 19:32), which is described in exactly the same terms.

He commanded him to be carried into the castle.—The Greek, which literally means encampment, is translated “armies” in Hebrews 11:34. By a transition that reminds us of the connection between the words castrum and castellum, or castle, it came to be applied to a regular structure of stone or brick, such as, for example, the Tower Antonia, described in the Note on Acts 21:31.