cover 1894 (22 June) commercial envelope from Cornabé & Co, addressed to Rugby "Per First Mail" and readdressed to Leeds, bears Yen T'ai Tower ½c. (2) and 1c. tied by the triple-ring datestamp and used in combination with Hong Kong 20c. on 30c. and 2c. carmine which are cancelled by British Post Office Shanghai c.d.s. A fine and choice double rate cover. Photo