The #North Porch#, which was evidently always intended to be, as it is to this day, the chief entrance into the church, consists of two bays marked externally by buttresses on each side: the inner order of moulding to the arch giving access to this porch springs from two shafts of Purbeck marble; the outer orders are carried up from the base without any capitals or imposts. The height of the crown of the inner arch above the capitals from which it springs is somewhat less than half the width at the bottom, and the radius of the curvature of the arches is greater than the width. Over the arch is a square-headed two-light window, lighting the room over the entrance. The roof differs from all the other roofs of the church since it is covered with stone tiles, while the others are covered with lead. There are buttresses set diagonally at the two northern angles of the porch. Between the porch and the transept are three two-light Decorated windows. The tracery of all these is alike, but differs from that of the two windows to the west of the porch. The most picturesque feature of the north transept is the turret containing the staircase by which access is obtained to the tower. This, before the church was enlarged in the fourteenth century, formed the north-west angle of the Norman transept: projecting towards the north, its base is rectangular. This rectangular portion rises nearly to the level of the tops of the aisle windows, above this level the turret is circular, and rising above the transept roof is capped by a low conical roof of stone tiles. Two string courses run round it, one at the bottom of the circular part, and one a little higher up. This turret was once known as the "Ivy Tower," from the ivy that grew on it, but this was all removed at the time when the transept was altered in 1891. At that time the side walls were raised about two feet, and the roof was raised to the original pitch of the Norman transept, and at the same time the tracery of the north window, which was of a very plain and clumsy character, seventeenth-century work, was removed and the existing tracery inserted. Much picturesqueness has been sacrificed to make these changes. The portion of this transept to the north of the turret was added about the middle of the fourteenth century to form the chantry founded by Bembre, who was dean from 1350-1361. This part contains, besides the large window, two smaller two-light windows, which look out respectively to the east and west. The tracery in these is almost entirely modern. Beyond the transept is the wall of the north choir aisle. This stands farther to the north than the wall of the nave aisle; in fact, it is in a line with the original north end of the Norman transept. In this wall, close to the transept, is a small round-headed doorway. And, farther to the east, is another larger pointed doorway between the second and third windows of the choir aisle, counting from the transept eastward. This doorway is