38 Transactions. 



Tlie masonry consists of a wall starting from the east side of 

 Bridge Street, and extending eastwards 10 feet 5 inches, thence 

 in a direction south-east 6 feet 3 inches, and again eastwards 40 

 feet 4 inches, terminating in a line with the Brewery Street 

 end of the buildings lying on the north side of the narrow street 

 before mentioned. The depth at which the wall is founded varies, 

 being upwards of 10 feet below the surface at Bridge Street, 

 and 4 feet below the surface of the water in the river at 

 tlie bridge, 4 feet below the surface at Brewery Street, and 6 feet 

 midway between these points. The top line of the wall is also 

 irregular, and the work varies in height from 9 feet or more at 

 Bridge Street to about 4 feet at its centre, and 2^ feet at 

 Brewery Street ; and it measures about 3 feet in thickness. The 

 masonry is solid and strong. It is composed of the red sandstone 

 of the district, well cemented together with lime mortar in which 

 is a mixture of shells, and it is faced on one side, the south one, 

 with hewn ashlar, in regular coui'ses about 1 1 inches in height. 

 The westmost part of the wall is in a line with the south side of 

 the Old Bridge. 



At a point 27|- feet east of Bridge Street the wall is pierced 

 by the remains of a culvert 4 feet 3 inches wide, the floor of 

 which is 9 inches below the surface of the water in the I'iver 

 opposite. The opening continues northwards beyond the thick- 

 ness of the wall, under the narrow street ; its sides are of 

 ashlar, similar to the facing of the wall, and rest on flat 

 projecting foundation-stones, the edges of which are splayed and 

 hewn like a base course ; and its top appears to have been 

 closed by arching. 



The west end of the masonry is terminated by the remains of 

 a large arch. Only the south end of the arch could be inspected, 

 and it showed a projecting springing course, 12 inches in height, 

 splayed on the top, and thirteen thin arch-courses, their thickness 

 being about 6 inches. The arch ring is about 18 inches deep, and its 

 angle is chamfered ; it is of good and tasteful workmanship, and 

 in excellent preservation. 



I have now described the masonry, and I may be permitted 

 to express the opinion tliat it has formed the east abutment of the 

 Old Bridge built by Lady Devorgilla in the 13th century, which 

 is known to have been originally of much greater magnitude than 

 the six arches which still span the river. 



In order that the full original dimensions of the Bridge may be 



