cover "Steamer Princess No. 3", mostly clear red large oval h.s. on 1852 blue folded letter headed "Winter Quarters" to Natchez, (Miss.), franked with 3c Brownish Carmine (11), large margins to barely touching, tied by grid cancel, matching "Steam" straight line h.s., fine strike, Simpson rates as "rare, 7 to 10 known" color photo