QUARTEY v. NORGAH [1967] GLR  319-333

Contract—Custom or usage—Incorporation in contract—Evidence of custom or usage—Method of proof—Question of fact—Court to determine existence of custom or usage—Type of evidence required—Parties bound by custom or usage when proved and whether they knew of its existence or not.

Evidence—Custom or usage—Proof—Evidence of interested parties only—Whether court will attach weight to such evidence.

