Baritone Saxophone,Piano - Level 2 - Digital Download SKU: A0.593176 Composed by Augustus Toplady. Arranged by David McKeown. Christian,Gospel,Praise & Worship,Sacred,Spiritual. Score and part. 3 pages. David McKeown #6417701. Published by David McKeown (A0.593176). Rock of Ages is a beautiful gospel song arranged here for Solo Baritone Saxophone and Piano.Rock of Ages was written by Rev Augustus Toplady. Tradition has it that Toplady, during a storm, took shelter in a fissure in a rock while walking through a gorge near his home. This incident inspired the lyric.