cover - Sheep Dip: 1864 (10 Aug.) U5 for Alexander McDougall, Manchester, Agricultural Chemist, with black vignette and advert. for shhep dip on front, stampless, used to U.S.A.; 1900 (8 Sept.) U5 for "LAWES' SHEEP DIP" with black vignette on reverse, bearing Great Britain 2½d. franking tied by "HARRISMITH/NATAL" c.d.s. cancellations, some small stain spots or other minor faults, good