China Covers and Cancellations Air MailInternational To Japan: 1940, two covers to North America via Japan with 1940 (11 Aug.) envelope to San Diego bearing 60c. franking tied by Peking Chinese/English c.d.s. with the grey-blue Par Avion etiquette crossed through in red crayon, the reverse with San Diego arrival duplex (28.8); 1940 (14 Nov.) air mail envelope to Canada bearing $1 franking tied by Hankow dotted c.d.s. (2 covers)