cover 1899 (Dec.) XU5 (opened-out) from Johannesburg to Port Elizabeth, bearing Transvaal ½d. and 1d. pair partly obscured by Martial Law label at top, showing framed "STOPPED BY CENSOR/RETURN TO SENDER" h.s. in violet and "RETURNED LETTER BRANCH/NATAL" c.d.s. (24.3.00). Photo