ODOI AND ANOTHER v. HAMMOND Land law and conveyancing—Customary grant—Grant of land to plaintiff—Subsequent grant of same land to defendant—Grantor adjudged not to be owner of land—Reconveyance of the land by the real owner to defendant—Effect of grant to plaintiff—Whether grant null and void. Customary law—Land—Title—Action by a stool or family for a declaration of title to land—Necessity to prove conclusively method of acquisition.