Parts of this piece may originate from an abandoned piece in the same genre that its composer promised for Cosima von Bülow. After this piece’s dedicatee rushed its first movement, its composer added “Allegretto” to that movement’s Ben moderato tempo marking. Two musicians’ parts start one bar apart and gradually merge in a canon from this piece that starts with the quarter notes “B, C-sharp, A, G-sharp, F-sharp, E.” Reminders to play molto dolce, sempre dolce, and dolcissimo intensify under a rocking motif in this piece that is first stated as a broken dominant (*) ninth chord and is developed in this piece’s Recitativo-Fantasia. Because its venue banned artificial light, this piece was premiered from memory in the dark according to Vincent D’Indy (“dahn-DEE”). This A major piece’s dedicatee played it “con (10[1])amore” since it was a wedding gift. For 10 points, name this piece for piano and a string instrument, composed by a Belgian organist for Eugène Ysaÿe ■END■