Instrumental Duet B-Flat Bass Clarinet,Instrumental Duet,Piano - Level 3 - Digital Download SKU: A0.734762 Composed by Joseph Hasper. Contemporary,Sacred. Score and parts. 10 pages. Joseph Hasper #2855795. Published by Joseph Hasper (A0.734762). Moderately difficult piece for Bb bass clarinet and piano. This is a tonal composition, a theme and variations based on the tune O Worship The King. The tune was composed by Sir Robert Grant (1779–1838), a British lawyer and politician. He was the author of a volume of sacred poems, which was edited and published after his death by his brother, Lord Glenelg. This volume includes some hymns, of which the best known is O Worship the King, based on Psalm 104.Includes parts for Bb bass clarinet and piano. A version for Bb Clarinet and piano is also available!