The collection is primarily professional letters written to Russell, but there are also a few letters from his wife and a few by him. There is also an autobiographical letter written by Russell. Most of the correspondence pertains to the Royal Meteorological Society, snow crystals, dew, frost, hail, fog, etc. Russell had wide-ranging interests, however, and some of his non-scientific concerns appear in the letters.

Autobiographical and folkloric stories told in Choctaw, followed by English translation, recorded by William D. Davies in McCurtain County, Oklahoma in May 1980.

Audio recordings, photographs, and born-digital manuscripts documenting primarily Ojibwe and Cree communities and individuals in Manitoba, Ontario, and Saskatchewan.