It shall be competent to the Commissioner of Revenue, on the ground of hardship or injustice, to suspend the passing of final orders in any case of appeal from a sale, and to represent the case to the Board of Revenue, who, if they see cause, may recommend to the local Government to annul the sale ; and the local Government in any such case may annul the sale and cause the estate or share of an estate to be restored to the proprietor on such conditions as may appear equitable and proper.