St. James's, Westminster (SW1) Was first called Prince's Street between the years 1765 and 1782. It formerly bore the name of Long Ditch, and at one time contained an ancient conduit, the site of which was marked by a pump. At the bottom of the well, it is said, was a black marble image of St. Peter and some marble steps. (Reference: Walcott's Memorials of Westminster, p. 72)