This dam was finished by the middle of August.  At the same time Gerard was preparing three canals in the principal valleys, and none of these works came up to his estimated costs.  The chateau farm could now be finished.  The irrigation channels through the plain, superintended by Fresquin, started from the canal made by nature along the base of the mountains on the plain side, through which culverts were cut to the irrigating channels.  Water-gates were fitted into those channels, the sides of which the abundance of rock had enabled them to stone up, so as to keep the flow of water at an even height along the plain.

Every Sunday after mass, Veronique, the engineer, the rector, the doctor, and the mayor walked down through the park to see the course of the waters.  The winter of 1832 and 1833 was extremely rainy.  The water of the three streams which had been directed to the torrent, swollen by the water of the rains, now formed three ponds in the valley of the Gabou, carefully placed at different levels so as to create a steady reserve in case of a severe drought.  At certain places where the valley widened Gerard had taken advantage of a few hillocks to make islands and plant them with trees of varied foliage.  These vast operations completely changed the face of the country; but five or six years were of course needed to bring out their full character.  “The country was naked,” said Farrabesche, “and madame has clothed it.”

Since these great undertakings were begun, Veronique had been called “Madame” throughout the whole neighborhood.  When the rains ceased in June, 1833, they tried the irrigating channels through the planted fields, and the young verdure thus nourished soon showed the superior qualities of the marciti of Italy and the meadows of Switzerland.  The system of irrigation, modelled on that of the farms in Lombardy, watered the earth evenly, and kept the surface as smooth as a carpet.  The nitre of the snow dissolving in these channels no doubt added much to the quality of the herbage.  The engineer hoped to find in the products of succeeding years some analogy with those of Switzerland, to which this nitrous substance is, as we know, a source of perpetual riches.

The plantations along the roads, sufficiently moistened by the water allowed to run through the ditches, made rapid growth.  So that in 1838, six years after Madame Graslin had begun her enterprise, the stony plain, regarded as hopelessly barren by twenty generations, was verdant, productive, and well planted throughout.  Gerard had built five farmhouses with their dependencies upon it, with a thousand acres to each.  Gerard’s own farm and those of Grossetete and Fresquin, which received the overflow from Madame’s domains, were built on the same plan and managed by the same methods.  The engineer also built a charming little house for himself on his own property.  When all was completely finished, the inhabitants of Montegnac, instigated by the present mayor, who was anxious to retire, elected Gerard to the mayoralty of the district.