The square billet, or corbel bole, used for supporting a blocking course. [Illustration] The cable moulding. [Illustration] The double cone. [Illustration] The pellet, or stud. [Illustration] The hatched, or saw tooth. [Illustration] The nail head. [Illustration] The lozenge. [Illustration] The studded trellis. [Illustration] The diamond fret. [Illustration] The medallion. [Illustration] The star. [Illustration] The scalloped or invected moulding. [Illustration] A variety of other mouldings and ornamental accessories are also to be met with, but those above described are the most common. Q. What kind of string-course do we usually find carried along the walls of Norman churches, just below the windows? A. A string-course similar in form to the common Norman abacus, with a plain face and the under part bevelled, is of most frequent occurrence; a plain semihexagon string-course is also often to be met with. Sometimes the string-course is ornamented with the zig-zag moulding. [Illustration: Norman Mouldings, from Binham Church, Norfolk, and Peterborough.] Q. What difference is there as to their general character and appearance between the early and late examples of Norman architecture? A. The details of those buildings early in the style are characterized by their massiveness, simplicity, and plain appearance; the single or double-faced semicircular arches, both of doorways and windows, as well as the arches supporting the clerestory walls, are generally devoid of ornament, and the edges of the jambs and arches are square. The undercroft of Canterbury Cathedral, the work of Archbishop Lanfranc, between A. D. 1073 and A. D. 1080; the crypt and transepts of Winchester Cathedral, built by Bishop Walkelyn between A. D. 1079 and A. D. 1093; the plain Norman work of the Abbey Church at St. Alban’s, built by Abbot Paul, between 1077-1093; and the north and south aisles of the choir of Norwich Cathedral, the work of Bishop Herbert, between A. D. 1096 and A. D. 1101, not to multiply examples, may be enumerated as instances of plain and early Norman work. In buildings late in the style we find a profusion of ornamental detail of a peculiar character, and numerous semi and tripartite cylindrical mouldings on the faces and edges of arches and vaulting-ribs. The transepts of Peterborough Cathedral, built by Abbot Waterville between A. D. 1155 and A. D. 1175, exhibit vaulting-groins faced with roll mouldings, and other details of an advanced stage; whilst the Galilee, Durham Cathedral, built by Bishop Pudsey, A. D. 1180, is remarkable for the lightness and elongation of the piers, which are formed of clustered columns; and the semicircular arches which spring from these are enriched both on the face and soffits with the chevron or zig-zag moulding. There are many intermediate gradations between the extreme plain and massive work of early date, and the enrichments, mouldings, and