The William Henry Donald letters primarily consist of correspondence between William Henry Donald (1875- 1946) and his friend, Harold K. Hochschild (1892-1981) where he described about his work in China, his involvement in the Xi'an Incident, and his life later in the Pacific Islands and return to China. Other materials in the collection include biographical information, a sketch of Donald, and news clippings about Donald.

The Yu Feng Tse papers (于鳳至檔案) document her family life and that of her spouse, the Young Marshall Zhang Xueliang, who was under house arrest since 1937, first in mainland China and later in Taiwan until he was free in 1992. The materials primarily consist of correspondence, writings, printed materials, photographs, as well as memorabilia, dating from 1928 to 2011, with its bulk dating from 1943 to 1996. The materials show the relationship between Yu Feng Tse who was in the United States and Zhang Xueliang who was in Taiwan at the time.