AYIAH v. COLEMAN Customary law—Property—Pledge or mortgage—House given by D to P as security for loan—D also surrendering title deed to P—Whether surrender per se evidence of mortgage—Agreement on transaction, exhibit A, describing parties as pledgor and pledgee—Exhibit A memorandum on transaction—Evidence establishing customary pledge—Significance of surrender of title deed—Whether P entitled to possession and collection of rent without accounting to D.