This painting by El Greco is also on the cover of Luke Timothy Johnson’s Brother of Jesus Friend of God: Studies in the Letter of James. It depicts James as a pilgrim. I have not had a chance to read up on the iconography / hagiography of James the Just. I know that the fact that there are several men named James in the New Testament, coupled with debates regarding James’ familial ties with Jesus have made tracing the imagery used to represent James quite murky.
All this aside, I really do like El Greco’s work here.