3¼in sq Magic Lantern Slides, Merl La Voy (1885-1953), one slide credit, and others - photographic slides taken in China during ascendancy of warlord Chang Tso Lin, probably mid-1920s, including US troops in role to protect Western interests - in sandbagged guard post on Soochow Creek, Shanghai, US officer with General Liu Wang Tao (La Voy credit), digging trenches, Chang tso Lin's artillery, US marines with machine gun and ammunition wagon, Japanese naval landing party drilling, with Nanking National council group, and others (21)