cover AMOY: 1900 (19 Feb.) "Maus" envelope addressed to Germany, the reverse with pair of "C.I.P." 5c. pair cancelled by Amoy bilingual c.d.s. with Lichtenthal arrival c.d.s. alongside, front bears pair of Hong Kong 5c. blue cancelled by a fine strike of the "I.P.O." h.s. and Hong Kong (12.2) c.d.s.; a few light tone spots, otherwise fine