The Pont du Garde, is that part of the aqueduct of Nismes which traverses the deep valley in which runs the Garden or Garde, between the mountains near Vers and St. Bennet.

This considered even alone, is one of the grandest erections made by the part, Romans in Gaul. The first row of arcades, beneath which runs the Gardon, is composed of six arches ; the second row has eleven arches, and the third range has thirtyfire. All these arches are semi-circular, springing from piers, more or less high ; it was

upon the third range that the water channel was formed according to some antiquaries. According to the measurement of a French engineer, the height of this aqueduct bridge is about 157 feet above the low water level of the river. Its length on the level of the moulding terminating the first range of arcades, is 561 feet, and 876 feet on the level of the moulding terminating the second story.

The total height, according to the same author, is 161 feet namely, 66 feet for the ;

first range, 66 feet for the second range, and 2 1J feet for the third range to the top of the flags covering the water channel ; the width of the bridge is 21 feet at the first range,

16 feet on the second, 10 feet on the third ; this forms a considerable offset on each stage ; the five piers of the first range of arcades were formed with salient angles or bees. The division of the arches on the first and second stories is the same ; the middle arch of the first range, under which the river passes, and which is the centre of the entire aqueduct, is70 feet in diameter three on each side are of smaller dimensions.