Only the merest fragment of this ancient church now remains, consisting of the east wall (Fig. 336), with an eastern tower attached to it. The masonry of the east wall shows it to be of the Norman period. There has been no opening of any kind in this wall. The returns of the chancel walls are only indicated on the east wall by the slightest traces in the jointing, so completely have they been cut away. The eastern tower (Fig. 337) is quite a unique feature in Scotland. It had no connection with the church, although built against it, and is of later erection by probably two or three centuries. The doorway is low and lintelled, and has a simple splay. The upper part of the tower has apparently been rebuilt, and, with the slated roof, dates doubtless from the seventeenth century. The tower is about 10 feet 6 inches square inside, and about 34 feet high to the top of the masonry. It contains no stair. In Ure’s _History of Rutherglen_ it is stated that there was a nave with side aisles, 62 feet long by 25 feet wide, “exclusive of the additions on the back and front;” that is, exclusive of the side aisles. Assuming these to have been eight or ten feet wide, we should have a church nearly corresponding in size with the present erection, built about a century ago, and occupying the site of the nave, as shown in outline on the plan, on which are also indicated the nave piers. The nave was thus about 62 feet long by 45 feet wide, and the chancel was about 42 feet long by 20 feet wide inside. Ure, by a mistake easily made, gives the dimensions of the chancel as ten feet less in length. He also mentions that there were five pillars on each side of the nave. This may mean four whole pillars and two halves (the responds), as shown in the plan, which, however, merely pretends to approximate to something like what the original was. [Illustration: FIG. 336.--St. Mary’s, Rutherglen. Plan.]