Correspondence re research, personal news.
J/93: Letters written by Elsden from Physiology Department, Edinburgh, 1941-1942.
J/94: Letters and cards written by Elsden from the School of Biochemistry and Emmanuel College, Cambridge, 1944-1946; Letters from the University of California at Berkeley, 1946-1948.
J/95-J/96: Letters written by Elsden from Sheffield, 1951–1953, 1958, 1960, 1965.
J/97: Letters and grant application from Food Research Institute, Norwich. 1967, 1971 and n.d.