Carol Matthau (Walter's wife) claimed that she was the inspiration for this Truman Capote heroine
[DOC] [TLE] Carol Matthau, 78; Writer, Longtime Wife of Walter Matthau - latimes [PAR] Jul 25, 2003 ... Carol Matthau, a former actress and writer who married famously three times ... 
and writer James Agee, and she professed to be the inspiration for Holly ... 
protagonist of Truman Capote's 1958 novella, "Breakfast at Tiffany's.".