cover COQUIMBO: 1865 (18 May) entire letter to London, bearing 1862-64 6d. lilac, plate 4, PD, tied by very fine strike of the "C40" obliterator, fine "PANAMA/3 JU 1865/TRANSIT" at left and inscribed "via Panama & West India Mail Steamers" in manuscript at top; fine and most attractive. Photo