ROYAL DUTCH AIRLINES (KLM) AND ANOTHER v. FARMEX LTD. Contract—Contract of air carriage—Breach—Liability of carrier—Air carrier failing to deliver a consignment of perishable mangoes for transit connection in Kano on agreed time—Absence of air way-bill mistakenly carried to Amsterdam by carrier being cause of delay—Shipper failing to inform connecting airline staff about arriving consignment—Whether carrier blamable for delay—Connecting second air carrier refusing to accept goods for transshipment despite availability of air way-bill—Whether second air carrier contributing to delay—Whether air carrier already in breach still protected under articles 20 and 21 of the Warsaw Convention, 1929—Carriage by Air (Colonies, Protectorates and Trust Territories) Order, 1953 (L.N. 155 of 1954)—Warsaw Convention, 1929, arts 20 - 21.