French Horn,Piano - Level 3 - Digital Download SKU: A0.1286885 Composed by Anonymous. Arranged by Toni Nita. Advent,Christian,Christmas,Holiday,Religious. Score and part. 6 pages. Toni Nita #877888. Published by Toni Nita (A0.1286885). A popular old Gregorian Chant arranged for French Horn & Piano, with rich harmonic detail and a midway modulation added.