Complex sentence: He was editor of "Hymns Ancient and Modern", still the standard hymn book in many Anglican churches today, and also wrote the hymn tune "Crucifer" for the popular hymn "Lift High the Cross".
Split into simpler sentences: He was editor of "Hymns Ancient and Modern", which is still the standard hymn book in many Anglican churches today. He also wrote the hymn tune "Crucifer" for the popular hymn "Lift High the Cross".