In addition to extended studies of orchestral scores themselves, the standard works of Berlioz, Gevaërt, Riemann, Parry, and others have, as a matter of course, been referred to. The subject under discussion has already been admirably handled by Lavoix in his voluminous work entitled "Histoire de L'Instrumentation," but it was unquestionably done through French glasses, and the scores of not one German romanticist are submitted to careful analysis beyond those of Weber and Wagner. "Parsifal" had not been produced at the time when Lavoix's book went to press, nor had such representative composers as Brahms, Saint-Saëns, Tschaikowsky, Dvorak then won their full meed of recognition. It is obvious, therefore, that the orchestration especially of the nineteenth century offers a fertile field for further profitable research. Again, the present writer is not aware of the existence of any comprehensive work in the English language upon the history of the orchestra and of orchestration.