1843 ENVELOPE WITH MALTESE CROSS USED TO OBLITERATE DATE STAMP ON REVERSE. Small envelope (93 x 48) used locally in London with postage paid in cash with good strikes 'CharlesSt.Middx.Hospital/1D.PAID' receiver and date stamp JY 20 1843/8Mg (morning). On reverse a different London date stamp JY 20 1843 which for some reason has been obliterated with strike of a black Maltese Cross. Very unusual. (Ref 109080).