Letters and collected material document the work of the Presbyterian Church in Shandong (Shantung) Province, China from 1869 to the 1940s. Carroll and Helen Yerkes were American Presbyterian missionaries in Shandong (Shantung) Province from 1904 to 1925. The parents of Helen Nevius Eckard Yerkes were Presbyterian missionaries stationed in Chefoo from 1869 to 1874.