It emerges on the north, and flows over a bridge composed of ninety arches, of which more than sixty, in Delorme's time, were remaining. This was terminated by a reservoir, whence the water, in like manner as before, descended by pipes into another valley, and in part passed it and the river Baunan, over a bridge of a reversed curvature, and mounted again on the opposite side, there entering a second reservoir at St. Foi.

The waters flowed hence in a canal, carried by a bridge for some way above ground, and then became subterraneous, and continued thus along the heights to the point near the gate of St. Irenseus. Here another reservoir was situated hence the waters flowed in ;

leaden pipes, which descended into the fosse of St. Irenseus, and passing along the bottom of it, rose again, and emptied themselves in a reservoir, built near a spot which can be traced in the walls of the city, at the Mall of Fourviere, above the gate of Trion, on the south side of a square tower. These pipes were not carried across this ditch and valley upon a bridge, as has been stated by some authors ; there are not the least vestiges of such ; but

they were bedded on a massive course of masonry. This aqueduct has a course of more than 13 leagues, or about 33 miles its distance in a right line, is about eight leagues, ;

and its descent from the bridge of the little Varizelle to the Fourviere, is 360 feet. Delorme next describes the nature of these reservoirs placed on each side of those valleys, across which the waters were passed in syphons over a bridge of reversed curvature. The one is for holding up, or receiving, and thence emitting, the waters which are to be conveyed in pipes, and the other is to receive a sufficient quantity of water for distribution to the succeeding canal.