- History of the Bahá'í Faith in Japan 1914-1938, by Agnes Baldwin Alexander Barbara R. Sims, ed. (1977). An account of the Bahá'í Cause in Japan, China, Korea, and the Hawaiian Islands, prepared by request of the Guardian.
- Notes on Words of the Guardian, by Virginia Orbison (1956). Ten pages of notes, preserved as an appendix to Orbison's lengthy manuscript "Diary of a Pilgrimage to the Holy Land, Made by Virginia Orbison, January 15 to February 11".
- Raising the Banner in Korea: An Early Bahá'í History, by Barbara R. Sims (1996). Bahá'í activities in Korea 1921-1988.
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