cover 1829 (25 June) entire letter from the Consul-General of the King of Sardinia in the Ionian Islands at Corfu to his counterpart at Malta, showing manuscript "2/6" in red ink with, on reverse, despatch d.s. overstruck by fine "July. 1.S:&3.d" h.s. (DC-15--the earliest recorded date of use); the entire disinfected at the Malta Lazaretto and resealed. Very rare. Photo