Of the subterranean aqueducts in France the finest is that of Arcueil, which serves to conduct water to that village.
It is 44,300 feet in length, or upwards of 8 miles, extending from the valley of Arcueil to the castle at the gate of St Jaques, all built of hewn stone.
It is about 6 feet in height, and has on each side a foot-path 18 inches wide; it has a declivity of 1 foot in 1300.
After the downfall of Napoleon (1814) he was nominated Peer of France, with the right of a seat in the Chamber, and in 1817 was raised to the dignity of marquis.
His last years were spent in his villa of Arcueil, which became a centre of learned visitors and studious young men (Biot, Poisson, etc.).
He died at his home in Paris, Rue du Bac, attended by the curé of the Foreign Missions, in whose parish he was to be buried, and the curé of Arcueil, whom he had called to administer the last comforts of religion (de Joannis, p.