FIRST BOER WAR - 1d CONCESSIONARY RATE COVER WITH RARE "B16" TPO CANCEL - c. Apr. 1881 env. to London ex HMS Carysfort with 1d venetian red tied by rare "B16" numeral (Parmenter H £300) of the Plymouth Bristol Sorting Carriage, large part London cds for 16 May 1881 on the back. Cross Reference: T.P.O.s AND STATION MARKS, INCOMING OVERSEAS MAIL, MILITARY - BOER WAR, MILITARY - PENNY CONCESSION RATES (Image)