BOER CENSORSHIP: 1900 Envelope from Pretoria (7 APR 00) to Lancashire, England franked Transvaal 2½d. Bears at top left a superb bold strike of the very scarce double ring GEZIEN/CENSOR Boer censor mark dated 6 APR 1900. Lourenco Marques transit mark, Lytham arrival cds MY 13. Backflap missing, minor imperfections. Generally F-VF, a rare and attractive Boer War cover.