First collected sources, 1923 -- 1927 Box 1 Series 1: American Institute of Christianity records, 1923 -- 1927
Oversize materials, circa 1922 -- 1927 Box 8os Series 2 : American Encyclopaedia of Christianity records, circa 1920 -- 1927
Second collected sources, 1920 -- 1921 Box 2, Folder 1-7 Series 2 : American Encyclopaedia of Christianity records, circa 1920 -- 1927