1d. black, plate 6, SL, close at upper right, otherwise large margins, tied by neat black MC to lettersheet (side flaps missing, 5mm hole at upper left), "T.P. King William St." handstamp on front and red datestamp "SP 17 1840" on reverse. Very nice cover used within the first month of the London Two Penny Post "Experimental black MC" period, Holcombe opinion (1991).
