Young Audubon's dislike of Dacosta, the uncertainty of the mining project, and other difficulties of the situation soon decided the partners to cut short their stay at "Mill Grove." Both were equally interested in the lead mine, but after working several months without success in an attempt to form a mining company, they wisely decided to leave such experiments to the enthusiastic Dacosta and to seek an opening in trade, where the hazard would be no greater and their ignorance less profound. Following the advice of their Quaker friend, Miers Fisher, they decided to sell to Dacosta their remaining rights in "Mill Grove." As a preliminary it was necessary to divide the property which had been held in common by him and Lieutenant Audubon since 1804, and this division was effected by an agreement drawn up at Philadelphia on the fifth day of September, 1806.[124] Ten days later the remainder of "Mill Grove" was conveyed to Francis Dacosta, representing a number of capitalists whom he had managed to interest in the mine, of whom the astute Stephen Girard is said to have been one. The sale was subject to conditions,[125] dependent upon their success in mining lead, which, as will appear eventually, could not have been fulfilled. These various transactions are so clearly set forth by Ferdinand Rozier in writing to his father at Nantes that we shall reproduce his letter in full:[126] _Ferdinand Rozier to Claude François Rozier_ PHILADELPHIA, _12 Sept., 1806_ Duplicate. MY VERY DEAR AND VENERABLE FATHER: Still in hope of cherished news from you, and replies to my letters of 31 May, 22 June, and 4 July, I have to tell you that we have since succeeded in closing all our business relations with Mr. Francis Dacosta, in the following manner: We are anxious that our method of procedure may be satisfactory to you; we have followed the advice of Mr. Miers Fisher, and have had his approval in all that we have done. What should set you at rest is that as regards your investment, you will find that I have made quite a neat profit. Here is a copy of the agreement. "It is agreed between Mr. Dacosta and Mr. J. Audubon that the farm of "Mill Grove," which they now hold in common, shall be divided between them as follows: "1. Mr. Dacosta shall have the lot of 113 and a half acres, situated on the N.E. side of Perkioming creek, with all the buildings, mines, et cet., and in general all that it contains. "2. Mr. Audubon shall have the lot of 171 acres, situated on the other side of the creek. "3. Mr. Dacosta shall pay to Mr. Audubon for the difference [in value] of the lot of 113½ acres, and of that which it contains: "1. The sum of eight hundred dollars, payable with interest, in three years from this day;