Jazz. Gospel. African-American. Popular hymn tune tune made famous by Fats Waller. Set of jazz variations on the popular gospel hymn for trumpet or treble clef baritone. Variations are written out although middle of the piece includes repeats for improvization. A cadenza brings the piece to a subtle conclusion in the low register (to low A below the staff). Glissandos, harmonic lip-slur and alternate valve techniques add interest to this unique arrangement.