Great Britain 1840 1d Mulready lettersheet SGME1Great Britain 1840 1d Mulready lettersheet (Forme 1, Stereo A9), SGME1. A very fine used example sent from Market Drayton to Deptford neatly cancelled by a red Maltese Cross with a matching Market Drayton dispatch circular date stamp alongside for MY. 19. 1840. Backstamped by a London transit datestamp for MY. 20. 1840. A very scarce and attractive "May date" cover. Provenance: Ex. "Mayflower" Grand Prix Collection. Accompanied with a 2010 British