Photographs of the Tien Yuan Electro-Chemical Works, Ltd. (Tian yuan dian hua gong chang gu fen you xian gong si 天原電化工廠股份有限公司, which was located in Maoershi 猫儿石, Jiangbeiqu 江北区, Chongqing 重庆市. They were accompanied by a letter dated Jun. 16 1943 from P.N. Woo to W.V. Blewett at the British Embassy, and a list of captions for the photos. All the photographs were small and stuck onto a sheet of paper.