The Corporation shall hold so much, if any of the proceeds of sale of the said Mansion House and other hereditaments, called Mazagon Castle, if and when sold, as shall exceed the sum of two lakhs and seventy-five thousand rupees, upon trust, to invest the same upon one or more of the investments authorised by section 6, and shall hold the said investments, upon the same trusts, and for the same ends, intents and purposes, and with the same powers, as are, by this Act, declared of and concerning the funds which are subject to the Settlement effected by this Act.