The Secretary of the Interior is directed to cause settlements to be made with all persons appointed by the Indian councils to receive moneys due to incompetent or orphan Indians, and to require all moneys found to be due to such incompetent or orphan Indians to be returned to the Treasury; and all moneys so returned shall bear interest at the rate of 6 per centum per annum, until paid by order of the Secretary of the Interior to those entitled to the same. No money shall be paid to any person appointed by any Indian council to receive moneys due to incompetent or orphan Indians, but the same shall remain in the Treasury of the United States until ordered to be paid by the Secretary to those entitled to receive the same, and shall bear 6 per centum interest until so paid.