david stuart horner died in 1983; his obituary appeared in "the times" on 7 january 1984. his manuscript collection was donated at the eton college library. the largest single collection of sitwell papers is in the harry ransom humanities research center at the university of texas at austin. it includes 951 letters from osbert sitwell to david horner and it has been said that horner sold them to the university of texas as a spite gesture for having being denied the inheritance of montegufoni, the italian castle he loved, over sitwell's death; osbert sitwell wrote off horner from a previous will, leaving his london flat to his male nurse, frank magro, and montegufoni to his nephew.