The Béarnais, who had spent his early years among farmers, nourished great ideas as to how to help them on and to make trade flourish in the land, so great as sometimes to startle his most devoted councillors, notably Sully, his finance minister. The King, seeing that the industry of weaving silks was on the increase, and that to supply the looms raw material had to be imported in great quantities, was desirous of encouraging the production of silk in France, and he confided to a gentleman of the Vivarais, Olivier de Serres, the mission of developing sericulture by writing a treatise advocating it. De Serres published his "La cueillette de la soie" in 1599. Two years later he brought to Paris twenty thousand young mulberry trees, which were planted in the gardens of the Tuileries. At the same time Traucat, a gardener at Nîmes, with royal assistance, erected vast nurseries, which in forty years supplied over five millions of mulberry stocks. Sully, who had at first thought the King's projects chimerical, threw himself eagerly into them when he saw that they were likely to increase the wealth of the country; prizes were offered, subventions were promised to such as should take active part in the development of the industry. There exist still some of the old mulberry trees planted four centuries ago, that the Cevenol peasants designated Sullys in commemoration of the great minister of Henry. Sériculture made no progress during the reign of Louis XIII. It lost ground, and it was Colbert, the celebrated minister of Louis XIV., who resumed forty years later the policy of Henry IV., and had to struggle against just the same difficulties of inertia and indifference among nobles and peasants alike. Colbert, following the same idea as his predecessors, wished that France should produce the raw material needed for the looms of Lyons, which were using 500,000 kilogrammes of foreign silk, whereas the French harvest produced at the outside 20,000 kilos of raw silk. To attain this result, exemptions from taxation were accorded to plantations of mulberry trees and to magnanaries of silk. In the Langue d'Oc, the silkworm is called _magnan_, derived from the Latin _magnus_, as giving the greatest profit to the farmer, and the sheds in which the worm is brought to spin is called a magnanerie. A bonus of twenty-four sols, equal to five francs, was given for every mulberry plant that lived over three years. The Protestants of the south devoted themselves especially and with great energy to the rearing of silkworms. In 1650 De Comprieu, Consul of Le Vigan, introduced the new industry into the Cévennes from the Vivarais where it had taken root, due to the initiation of Olivier de Serres. A few years later Colbert brought a silk-spinner, Pierre Benay, from Bologna and installed him near Aubenas, in a factory for the spinning of the thread.