Jean Ledrut has only ten credits on imdb, which end with WHITE COMANCHE in 1968, but one of those scores was for THE BATTLE OF AUSTERLITZ (1961), where Welles had a cameo as Robert Fulton, explaining his latest invention to Napoleon (that scene may still be on YouTube). I couldn't find any pictures of Ledrut on the internet either, and there is no Wikipedia entry on him.
As this article
https://sdtom.wordpress.com/2012/01/09/ ... an-ledrut/
on his Trial score points out:
If Jean Ledrut, composer of The Trial, is remembered at all it will be for his lawsuit against rock and roll British star Joe Meek (1929-1967) for plagiarism and his use of a 4 note motif allegedly taken from La March d’Austerlitz (1960) in his 5 million copy hit Telstar.
