This hymn, also known as Fairest Lord Jesus or Crusader's Hymn, has been around for perhaps as long as 800 years, but the first written version was from the 1600s in Germany. The source is unknown, but regardless who wrote it or when, it continues to be a favorite to this day.
In modern hymnals, this tune appears in 4/4 time, but this duet is written mostly in 6/4 and has a strong feel slow 3 beat.
Written for young players, this piece is just challenging enough to be interesting for all. It should work equally well with two cellos, two bassoons, or two euphoniums.
BEAUTIFUL SAVIOR, arranged by Tom Kirkland for two trombones without accompaniment, comes in a pdf file of 155K, with two pages of music and a license page, three pages in all. Performance time should be about 1:50.