The Corporation shall, with all convenient speed, invest all moneys which may be received by them upon any sale or exchange which shall be effected by them under the powers conferred by section 24, either in the purchase of any one or more of the securities specified in section 6, or in the purchase of other lands and hereditaments in the Island of Bombay, suitable for the support of the dignity of the said title; provided that every such purchase of lands or hereditaments be made with the consent in writing of the person for the time being entitled to, and in the enjoyment of, and said title conferred by the said Letters Patent.