For those of you who have not yet seen them, the General Commission on Archives and History (GCAH) has a terrific collection of digitalized photographs from Methodist mission work, many of them from the late 19th/early 20th centuries. These photos cover most of the areas of the world in which UMC predecessor bodies were doing mission work. Some are sorted geographically, and some are sorted thematically. The photos are a good resource for both teaching and research.
To access the photos, visit this page of GCAH.
For a fuller article about the photos, read this story from UMNS.