Sec. 4 And be it further enacted, That if, upon any of the lands now occupied by the Indians, and to be exchanged for, there should be such improvements as add value to the land claimed by any individual or individuals of such tribes or nations, it shall and may be lawful for the President to cause such value to be ascertained by appraisement or otherwise, and to cause such ascertained value to be paid to the person or persons rightfully claiming such improvements. And upon the payment of such valuation, the improvements so valued and paid for, shall pass to the United States, and possession shall not afterwards be permitted to any of the same tribe.
