Unused on cover / entire letter 1867? mourning envelope to Savannah, marked "Pr. Str. Corsica", showing fine light strike in red (Type P1) and bearing US 3c. alongside tied by New York c.d.s. with handstruck "Due 2" adjacent, framed "UNCLAIMED" in red and framed "ADVERTISED" with, on reverse, trace of "NASSAU-NEW PROVIDENCE" d.s. (Type N2) and arrival c.d.s. A very rare and attractive franking. Photo