Brass Quintet Horn,Trombone,Trumpet,Tuba - Level 4 - Digital Download SKU: A0.1254003 By David Mason. By John Hughes. Arranged by David Mason. Multicultural,Praise & Worship,Religious,Sacred,Traditional,World. 10 pages. David D Mason #847606. Published by David D Mason (A0.1254003). John Hughes composed CWM RHONDDA ( Guide me, O thou great Jehovah) in 1905 and it has since become universally known. It is used for worship in congregations around the globe and across denominational lines.