'Nanking (Nanjing) Arsenal'. 'If the Chinese first taught us the use of guns (... at the siege of Khai-fung-fu (Kaifeng), in 1232), we are certainly repaying the obligation by instructing them how our deadliest weapons are to be made'. From the left, a gun-carriage, an officer standing behind a rocket tube, a pile of shells, and a newly made machine-gun being tested.