Section 10. That George W. Linville, who was on the twenty- third day of December, eighteen hundred and fifty, appointed by the Court of Common Pleas of the city and county of Philadelphia, trustee of James Lee and Alexander Lee, be, and he is hereby authorized and empowered at public or private sale to sell and convey in fee simple, or otherwise, the whole or such part and parts as he may deem expedient of the property and estate, hereditaments, appurtenances, and premises of which he the said George W. Linville, by his said appointment, is trustee under the last will and testament of William Lee, deceased, or under any conveyance or assurance made by the said William Lee in his lifetime in trust for the said James and Alexander, or either of them, and to convey to the purchaser and purchasers thereof as good and valid estate or estates in the premises as the said William Lee was at any time seised of and entitled to both in law and equity, and discharged from the trusts of his said will and of such conveyance or assurance, and without any obligation on the part of the said purchaser and purchasers to see to the application of the purchase money: Provided, that the said money or security or securities received in payment therefor shall be held by the said trustee and his successors in the trust, in such manner as the said Court of Common Pleas may approve or direct, for the same uses, intents, and purposes as are declared and appointed in respect to the said property and estate, in and by the said last will of the said William Lee or any conveyance or assurance thereof in trust for the said James and Alexander, or either of them, made by him the said William Lee in his lifetime: Provided, That said trustee shall give security, to be approved by the Court of Common Pleas of said county, for the faithful application of the proceeds of said sale or sales: And provided further, That the said court shall approve of said sale or sales.