A. They are either semicircular, or triangular-arched headed, but the former are more common. In those, apparently the most ancient, the voussoirs or arched heads are faced with large flat bricks or tiles, closely resembling Roman work. Doorways of this description are to be met with in the old church, Dover Castle; in the church of Brixworth, Northamptonshire; and on the south side of Brytford Church, Wiltshire. The doorway, however, we most frequently meet with in Anglo-Saxon remains, is of simple yet peculiar construction, semicircular-headed, and formed entirely of stone, without any admixture of brick; the jambs are square-edged, and are sometimes but not always composed of two long blocks placed upright, with a short block between them; the arched head of the doorway is plain, and springs from square projecting impost blocks, the under edges of which are sometimes bevelled and sometimes left square. This doorway is contained within a kind of arch of rib-work, projecting from the face of the wall, with strips of pilaster rib-work continued down to the ground; sometimes this arch springs from plain block imposts, or from strips of square-edged rib-work disposed horizontally, and the jambs are occasionally constructed of long and short work. [Illustration: Anglo-Saxon Doorway, St. Peter’s Church, Barton-upon-Humber.] Q. Mention the names of churches in which doorways of this description are preserved? A. The south doorways of the towers of the old church at Barton-upon-Humber and of Barnack Church, the west doorway of the tower of Earls Barton Church, the north and south doorways of the tower of Wooten Wawen Church, Warwickshire, the east doorway of the tower of Stowe Church, Northamptonshire, the north doorway of the nave of Brytford Church, Wiltshire, and the north doorway of the nave of Stanton Lacey Church, Salop, though differing in some respects from each other, bear a general similarity of design, and come under the foregoing description. [Illustration: Belfry Window, north side of the Tower of Wyckham Church, Berks.] Q. How are we able to distinguish the windows of the Anglo-Saxon style?