cover 1877 (12 Dec.) "Hobson" envelope to Scotland by "French Mail" bearing 12c. blue tied by a fair strike of the "C1" obliterator with the type B despatch c.d.s. alongside (an early example of a Canton cover with the despatch c.d.s. struck on the face); the reverse with a faint strike of the "CUSTOMS/CANTON" double-ring c.d.s., Hong Kong and Edinburgh c.d.s. Fine and scarce. Photo