Copy of a letter from Joseph Needham to Rewi Alley in China, asking him if he could make sketches of the pictures of horses attached to carts in the cave paintings of Chienfotung, Kansu, China, and discussing other matters, 1947-05-05, GBR/1928/NRI/SCC2/101/1/14. The Papers and Possessions of Joseph Needham, GBR/1928/NRI/NRI2. Needham Research Institute. https://archivesearch.lib.cam.ac.uk/repositories/21/archival_objects/345468 Accessed January 03, 2025.