In what was surely a nose-tweak at those fooled by this imposture, Casadesus also reported that "The upper stave is notated in D, the lower in E". Since the violin is not a transposing instrument, there would have been no obvious technical reason for the upper staff to be written in a different key from the lower staff, especially for what sounds more like a short score than a completed score.
Casadesus pointed out that the upper staff of the piece was written in D while the lower staff was in E, which seemed unusual given that the violin is not a transposing instrument.