During 1964-1965, George M. Furnival was the Director of Biometrical Studies for the U. S. Forest Service in Washington, D.C.
He kept copies of correspondence that was sent from his desk, and these letters have been scanned and saved in pdf format in two files: Furnival_1964corresp.pdf (70 pages), and Furnival_1965corresp.pdf (247 pages).
These files are accompanied by index files (Furnival_1964corresp_index.pdf (70 pages), and Furnival_1965corresp_index.pdf ) which provide a table of contents for each collection.
There is also a one-page file, BiometricalStudies_ResearchProgram.pdf, which provides a description of the Biometrical Studies Research Program at that time
These files are stored at http://research.yale.edu/environment/biometrics/gmfusfs/