This church (Fig. 1127) consults of a nave of three bays with aisles, and a western tower, north and south transepts, and an aisleless choir of three bays, with an eastern apse. The western part of the church and a portion of the choir extending as far as the south doorway (at which point a wall has been erected across the building, as indicated by dotted lines) are used as the Parish Church. About 1854 this church underwent a thorough restoration. Much of the interest attached to it as an ancient building was thus effaced, but the original plan has not been greatly altered. The appearance of the building before the above date is shown by Fig. 1128, which is reproduced from a drawing in the Hutton Collection in the Advocates’ Library.[94] The steeple shown in this view is said to have been built in 1762.[95] It resembles somewhat the old steeple of Glasgow College,[96] and is much more likely to have been built, as the latter was, in the seventeenth century than in the eighteenth. The tower was probably repaired at the latter date, when, as we are informed, the church itself was so treated. The walls of the tower, where they have been left unrestored, and the staircase turret adjoining are undoubtedly older than the eighteenth century. The eastern portion of the choir (Fig. 1129) has stood for centuries in a roofless and ruinous condition. It has originally been vaulted, probably with a pointed barrel vault supporting a stone roof. As much [Illustration: FIG. 1127.--The Collegiate Church of Dalkeith. Plan.] of the vault remains (Fig. 1130) as is self-supporting, and has on the surface and in the angles of the apse moulded ribs at intervals springing from corbels. The east end terminates in an apse of three bays, in each of which, and in the bays of the south wall, are windows of three lights, filled with plain looped tracery. The windows of the apse have been partially built up (see Fig. 1129). The apse windows are built at the same level as the other windows, thus leaving a great height of plain wall above them. This height of wall over the windows was [Illustration: FIG. 1128.--The Collegiate Church of Dalkeith. View from South-East. (From a Drawing by Charles Sanderson in the Hutton Collection in the Advocates’ Library.)] rendered unavoidable by the barrel vault of the interior, which required the arches of the windows to be kept below the springing of the main vault, as may be observed at Ladykirk, Seton Church, and elsewhere. In the churches of Linlithgow and Stirling the central window of the apse is larger than the others, but in those cases the vaulting is different, and allows greater height for the windows. The parapet above the walls of the choir is plain and rests on a string course, which has been carved with foliage. The doorway in the south side (Fig. 1131) is round arched, and in the freedom of the treatment of its details very much resembles what is found in the neighbouring Church of Rosslyn.