Folder 6 ________________. Correspondence concerning a proposed volume on extinct and vanishing fishes, 1945. Correspondents include George Sprague Myers and Childs Frick.
Folder 5 _________________. Childs Frick Collection, 1948-1949, 1957-1960, 1964, 1971-1972. Correspondence concerning Wetmore's research on the collection of fossil birds. Correspondents include Childs Frick and Harold E. Anthony.