1D GREY-BLACK PL.10 (SG3)(OK) ON COVER LONDON TO BLANDFORD REDIRECTED TO SHERBORNE. Fine entire from London to "Erle Drax Charborough Park, Blandford, Dorset" with a fine 1d grey-black from the very scarce plate 10 (SG3) lettered OK with four very close but clear to very large margins tied fine black M.C. Letter redirected to Holness House, Sherborne, Dorset and on reverse BLANDFORD date stamp MA 9 1841. Plate 10 on cover cats £3,500. (Ref 110267).