Piano,Trumpet - Level 3 - Digital Download SKU: A0.890327 Composed by R. Christopher Teichler. Arranged by R.T. Legacy. 20th Century,Christian,Sacred. Score and part. 5 pages. R.T. Legacy #3620517. Published by R.T. Legacy (A0.890327). Most commonly known as the hymn tune for O God, Our Help in Ages Past. Written for piano and trumpet, this arrangement is suitable for church offertories or special music. This is a reflective and intimate setting on a hymn tune which is often found in more majestic contexts.