William Armstrong (1867-1931, Shanghai Municipal Police 1893-1927) rose to become Director of the Criminal Investigation Department of the SMP (its detective branch) from August 1918 until his resignation in 1927. This collection includes photographs from police and other sources recording major political events that took place in Shanghai, such as the aftermath of the 1925 May 30th incident, as well as images Armstrong appears to have taken himself on houseboat leisure trips in the Taihu region west of Shanghai. The William Armstrong Collection consists of 450 images from four albums. HPC refs: Ar01, Ar02, Ar03 and Ar04.