The parapets of the nave and nave aisles are evidently, from the style of the mouldings and ornaments, of late date.
There seems to be no reason to doubt that, as above stated, the upper portions of the nave were carried out about the time of Bishop Tervas, in the middle of the fifteenth century. The earlier part of the restoration, including the main piers and arches, and perhaps the tracery of the two lower windows of the west front, were possibly executed by Bishop
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Fig. 964.—Paisley Abbey. Pier of Nave.
Lithgow, who built the north porch, and the completion of the nave was carried out by Bishop Tervas. A striking peculiarity of the interior of the nave is a series of large corbels (see Figs. 961 and 962), which project from the spandrils of the triforium arcade. The object of these corbels appears to have been to enable a passage, which is formed in the interior of the clerestory windows, but does not run through the wall in a straight line from end to end as is usual, to be
