AMUA-SEKYI AND ANOTHER v. SASU AND ANOTHER Land registration—Conveyance—Priorities—Prior customary grant—Effect on sub-sequent grant to another even when that registered earlier—Nature of burden of proof on plaintiff—A establishing customary grant to vendor in 1959—Stool conveying same plot to Y in 1974—Y's document registered earlier—Whether Y's document gaining priority over A's document.