The chancel arch (Fig. 295) is the only Norman feature now remaining in the interior. It is in two orders, having on the outer order the usual chevron ornament, with a notched hood moulding similar to what is found at Dunfermline. The inner order has a bold bead on the edge. The arch is quite plain on its inner face towards the chancel. It is carried by three semi-shafts (Fig. 296), with cushion caps and simple bases. The abacus has been carved with facets. On the exterior of the chancel there occur on the north and south sides (see Fig. 292) characteristic Norman corbels supporting the wall-head parapet. These consist generally of the usual bridled heads and monstrous faces, but they are now very weather-worn. The north wall of the nave has been taken down and a north aisle added (see Plan), apparently in the year 1631, as that date (Fig. 297) is carved on a window lintel of the east wall. In the north gable of this aisle there are two traceried windows, somewhat after the style of the Perpendicular Period. (Fig. 298.) It will be observed that the mouldings of the loop form of the tracery do not mitre with the arch mouldings. At a later period a central window, without tracery, has been placed in the north wall of the aisle. It corresponds exactly with the windows [Illustration: FIG. 295.--Duddingston Church. Chancel Arch.] seen in the south side, and with the one in the east wall of the chancel, judging from which it was probably at this later period that all the present windows, seen in Fig. 292, were inserted. The original windows were, doubtless, the usual small windows found in Norman churches, and when they came to be enlarged, the builders probably increased the buttresses to compensate for the weakening of the wall, and added the conical finials on them and on the gables (see Fig. 292). It is obvious that to this period also the upper part of the tower belongs. The lower part of the tower, although not of the original structure, is, we are inclined to think, of considerable antiquity; it opens into the church with a plain, round arch. The staircase shown in it and on the north aisle lead to galleries. [Illustration: FIG. 296. Jamb of Chancel Arch.] [Illustration: FIG. 297. Lintel in East Wall, North Aisle.] [Illustration: FIG. 298. Window in North Aisle.] During the reign of William the Lion (1165-1214) the church and lands of Dodin-ston were acquired by the Abbey of Kelso, but from whom they were acquired is not known. There were several persons of the name of Dodin, but the one who gave his name to this place does not appear to be known. But there was a “Hugo filius Dodini de Dodines-tun” who witnessed a charter to the Canons of Holyrood in the time of William the Lion (Dalrymple _Collection_, Pref. lxvii.; also, _Caledonia_, Vol. II. p. 791.) In 1296 John Combale, the vicar of Dodinestun, swore fealty to Edward I. In the ancient _Taxatio_ (end of twelfth century), Duddingston Church is rated at twenty-five merks.