keeper of the prison. Same as "jailor" (Acts 16:23).
awaking out of his sleep. Literally becoming awake. Greek. exupnos. Only here. The verb exupnizo only in John 11:11.
drew out. drew.
would have killed. was about to kill. Greek. anaireo. See note on Acts 2:23.
supposing. Greek. nomizo. See note on Acts 14:19.
been fled. escaped. Compare Acts 12:19; Acts 27:42. Roman soldiers were responsible with their lives for prisoners in their charge.