cover 1942 (Dec.) envelope sent from Heidleberg to Nanking, undelivered and bearing an array of instructional and other marks including bilingual "RETURNED/TO WRITER" and large framed return to writer, but without reason for non-delivery indicated, return label applied in Nanking and red bilingual c.d.s. of Nanking, Tientsin and Shanghai, fine; also 1933 envelope (soiled) from Peiping to New York and returned, various markings including Shangahi bilingual c.d.s. in red. (2)