And when he had realized this, he went to the house of Mary the mother of John, also called Mark, where many people had gathered together and were praying.
KJV
And when he had considered [the thing], he came to the house of Mary the mother of John, whose surname was Mark; where many were gathered together praying.
ASV
And when he had considered the thing, he came to the house of Mary the mother of John whose surname was Mark; where many were gathered together and were praying.