ISB ~ Acts 12 v12

the house of Mary:A place of prayer and assembly for Jerusalem believers. According to one tradition, this is also the house of the upper room where Jesus and the disciples celebrated the Last Supper. See note on Acts 1:13.

Mark:According to tradition, the evangelist of the Second Gospel and a companion of Peter (1 Pet 5:13) and Paul (13:5). Like many Jews, he had both a Roman (“Marcus”) and a Semitic (“John”) name.

See introduction to Mark:Author.