APPIAH v. NKRUMAH AND OTHERS Estoppel—Per rem judicatam—Arbitration—Title to land—Sale of land to plaintiff by B.N., chief of Pinaman, in 1932—Subsequent land dispute between plaintiff and Pinaman stool resolved by arbitration before Okyenhene, overlord of Pinaman stool—B.B. chief of Pinaman signatory to arbitral award in favour of plaintiff—Successor to B.B. as chief of Pinaman bound by arbitral award.