1855 (June) envelope to New York "via Liverpool" bearing 1854-55 Strubel 15rp. red and 40rp. pale green (3, two with trimmed upper frame lines), all applied overlapping and cancelled by lozenge of bars, "THUN" despatch c.d.s. adjacent, "BOSTON/BR.PK." d.s. (5.7) adjacent. Very pretty