Craig Sellar Lang (13 May 1891 – 24 Nov 1971) was a New Zealand-born British organist, composer and music teacher. His best-known work is the Tuba Tune for organ.
Here is a nice prelude on the hymn Martyrdom. The hymn it gives is 'As Pants the Hart for Cooling Streams'. It is from a series of preludes for manuals only, although here I use pedals as well.