1909 back only of an envelope from Grenada JU 22) that was underpaid by a 1d as a 4d postage due has been bisected diagonally and a red manuscript ‘2d’ has been written on it. This has been tied by a POOLE JU 26 09 cancellation. No example of a whole 4d of this issue has been recorded on cover and this bisect with the manuscript 2d is unique. Regrettably only a back but a spectacular and unique item. Ex Sir John Marriott.