GD Plate 1A 1d. grey-black (moderate wear), S.G.AS2,

used on an envelope within London 13 June 1840, clear to large margins, tied by a red Maltese Cross cancellation, 'TP/East Barnet' Receiving House handstamp opposite, London octagonal code 'PD' date stamp on the reverse; fine. (S.G. £650)

The original letter of enclosure refers to an attack made on Queen Victoria and Prince Albert at 6 o'clock on 10 June 1840 as they rode up Constitution Hill in a low, open carriage. Several shots were fired at them by 18-year-old Edward Oxford who was committed for High Treason, but sent to an asylum and released 27 years later