1. Letter from George F. Cahill Jr to Daniel Nathans Creator: Cahill, George F., 1927-2012Howard Hughes Medical Institute Date: 1 August 1983 Genre: Letters (correspondence)
2. Letter from George F. Cahill Jr to Daniel Nathans Creator: Cahill, George F., 1927-2012Howard Hughes Medical Institute Date: 10 January 1985 Genre: Letters (correspondence)