John Nelson Darby explores the relationships of key figures named Mary and James in the New Testament, emphasizing their connections to Jesus and each other. He identifies Mary, the mother of James, Jude, and Joses, as the same Mary who is often mentioned alongside Mary Magdalene, and discusses the implications of these familial ties. Darby argues that James, referred to as the Lord's brother, is indeed the apostle James the less, highlighting the significance of these relationships in understanding the early church. He concludes that the identity of these individuals is crucial for grasping the narrative of Christ's life and the establishment of the church.