But, unfortunately, the nobleman and his wife were not content to remain in Germany, and after a few years resolved on trying their fortune once more in France. This time they determined on carrying on their operations upon a more extensive scale, and in 1632 they entered the kingdom of Louis XIII., accompanied by fifty German and ten Hungarian miners, together with private servants. The king at once renewed the commission given by Cinq-Mars in 1626, and the Baron commenced a series of explorations in Brittany and in the south of France. The Parliaments of Dijon and Pau having objected to the commission, the king issued an order to them to recognise the Baron and his wife, and to aid them in their search after minerals by affording them every facility which lay in their power. Notwithstanding this apparent royal support, the two mineralogists obtained no pecuniary assistance from Government, but were expected to carry on all their operations at their private expense. The maintenance of sixty miners, the prosecution of extensive works, and the travelling from province to province, could not fail to reduce the means of the couple very considerably. A little glory might accrue to them, but they were sure of becoming the objects of jealousy; they obtained praise from the king, but no money; and after having expended 30,000 livres--in fact, their whole fortune--they were as far from obtaining any pecuniary acknowledgment of their services as they were when first entering France. In 1632 the Baroness addressed a memoir to the king on the mineral treasures of the country; it was entitled, “Veritable Declarations made to the King and his Council of the rich and inestimable Treasures lately discovered in the Kingdom”; but as this met with no response, she reprinted it under the title “Veritable Declarations of the Discovery of Mines and Minerals in France, by means of which his Majesty and his subjects will be enabled to do without Foreign Mineral Trade; also concerning the Properties of Certain Sources and Mineral Waters lately discovered at Château-Thierry by Madame Martine de Bertereau, Baroness de Beausoleil.” In this interesting memoir one hundred and fifty mines are indicated as having been discovered by the Baron and his wife. The Government, satisfied of the value of the services of the two foreigners, but unwilling, for all that, to pay them, now, as acknowledgment, conferred on them a new brevet, giving them extended powers, and elevating the Baron to the grade of Inspector-General of all the mines in France. If glory alone could suffice as a reward to merit, the Baron du Châtelet and Madame de Bertereau must have felt content with the dignity now conferred upon them. But a glory which cost them their whole fortune, and which in no way repaid their labours, must have seemed to them a bitter deception.