The bulk of the collection consists of diaries, correspondence, memoranda, notes, clippings, scrapbooks which pertains to Albert Riedel's trip to Singapore trip the work he did as a representative of the International Eexecutive Service Corps. Riedel's papers also contain personal correspondence (1967-1974) with Foo Chee Chin of Singapore and a scrapbook of some of Riedel's speeches (1925-1960). There is also a photo album of his 1953 trip on the Rhine River.

The collection consists of 152 postcards and one black and white photograph of a church. The subjects include an image of World War I British troop trenches at Zillebeke, Belgium and scenes from China, England, Switzerland, France, Italy, Korea, Singapore, Sri Lanka, and Israel.

Collection of photographs taken in Japan, Egypt, China, Korea, and Palestine, 1919-1922.