A similar memorial plaque to Irving is located on the wall next to a baptismal font in the north transept. It is made of Dorchester stone with columns of Aberdeen granite and Caen stone, depicting the symbolic holly of Irving's coat of arms. Displayed in front is Irving's pew, one of the church's original pine furnishings. The opposite wall memorializes Dr. William Creighton, founder and first rector of the parish. The south transept contains St. Mark's Chapel, from a church in Beekmantown consolidated with Christ in 1951.