Franz Strauss (1822-1905), the father of the notable composer Richard Strauss, was an equally capable composer in his own right.  The Nocturno, Op. 7, for horn and piano was published in 1904.  This lyrical work, in ABA form, is of easy-to-medium difficulty.  Its key signature, broad dynamic range, grace notes, and turns require some detailed practice, but they are not an overwhelming undertaking.  The rhythmic elements of the work are fairly straightforward; however, it is important to pay close attention to the difference between the eighth notes, triplets, and sixteenth notes.  Overall, this is a beautiful, lyrical work that has become a standard in the horn repertoire.