SAH v DARKU AND OTHERS Estoppel—Res judicata—Forest reserve inquiry—Procedure for constituting an area as forest reserve-Commissioner adjudicating only on claims received—Scope of estoppel arising from findings—Notices for B(E) inquiry served neither on K sub-stool nor on its overlord—stool not estopped by judgment of commissioner—Plaintiffs not participating in BB inquiry but grantor stool did—Grantor stool not making any claim in respect of land in dispute—Whether plaintiffs estopped by commissioner's finding that stool without land in area in dispute-Forests Ordinance, Cap 157 (1951 Rev), ss 5 (1) and 7.