The original road was no doubt only gravelled (glarea strata); in 298 B.C. a footpath was laid saxo quadrato from the Porta Capena, by which it left Rome, to the temple of Mars, about 1 m.
To the west is a single-arched Roman bridge, the Pondel, which has a closed passage lighted by windows for foot passengers in winter, and above it an open footpath, both being about 31ft.
In well-equipped waterworks each house service pipe is controlled by a stop-cock accessible from the footpath to the officials of the water authority, and the process of waste detection by this method depends upon the manipulation of such stop-cocks in conjunction with the differentiating meter.
The inspector proceeds along the footpath from house to house, and outside each house he closes the stop-cock, recording opposite the number of each house the exact time of each such operation.
My house was on the side of a hill, immediately on the edge of the larger wood, in the midst of a young forest of pitch pines and hickories, and half a dozen rods from the pond, to which a narrow footpath led down the hill.
And the total roadway length 1000 ft.; the height of the roadway from the spring tide high-water level is loo ft.; the breadth of the roadway including two carriage-ways and a footpath is 30 ft.