From these passages it may be gathered that John's mother Mary had a large house in Jerusalem to which Peter fled after escaping prison; that John assisted Paul and Barnabas on their first missionary journey to Cyprus and as far as Perga in Pamphylia, but then returned to Jerusalem; and that later controversy over receiving John Mark back led to Paul and Barnabas parting ways, with Barnabas taking Mark back to Cyprus and both thereafter disappearing from the narrative of Acts. The reasons for John Mark's departure to Jerusalem and the subsequent disagreement between Paul and Barnabas have been subject to much speculation. Matthew Henry, for example, suggested that John Mark had departed "without and Paul's knowledge, or without their consent". However, there is simply too little data to regard any explanation with confidence.