Robert Sterling Clark, an heir to the Singer Sewing Machine fortune, was an American art collector, horse breeder, and philanthropist.
A Girl Crocheting, by Pierre-Auguste Renoir, 1875
Lanzhou and the Zhongshan Bridge under construction, taken by Clark in 1909
Arthur de Carle Sowerby was a British naturalist, explorer, writer, and publisher in China. His father was Arthur Sowerby.
A typical Qli pony, photo by Arthur Sowerby, 1909
Representation of Buddhist hell in the Longwangmiao at Yan'an, Shaanxi, photo by Arthur Sowerby, n.d.