No exclusively musical analysis of the works dis cussed is attempted, since it is aimed merely to give the concert — goer such information concerning their illustrative purpose as will enable him to place himself in an intelligent attitude towards their performance. Nor has the author indulged in speculative interpretations of any sort regard ing the poetic content of these works; he has con fined himself in every case to setting forth only such facts and Clews as have been ascertained or justifiably inferred.