Correspondence 1921-1974 [series]
Correspondence, 1921-1974, (0.5 linear feet) comprises two types of files. The first group appears to be a partial alphabetical file of Guthe's correspondence from 1925 to 1938, comprising only the letters A through C. Files of the second type do not bear any apparent relationship to the alphabetical files or any existing correspondence series, and their provenance is unknown. Additional correspondence can be found in the 1944 accession correspondence series.