KWANSA v. BRAHIMA Customary law—Native pledge—Cocoa farm—Pledge of cocoa farm for three years—Whether pledgee accountable to pledger after the three years—Transaction evidenced in a memorandum or receipt—Whether form of document prepared overrides incidents of customary pledge—Whether transaction could be re-opened under the Loans Recovery Ordinance, Cap. 175 (1951 Rev.), s. 3.