Improvisation for Diapasons

Noel Aubrey Bonavia-Hunt 1882-1965.
When I looked at the music for David's Earnest Halsey pieces I saw this music in Organ Loft Vol 5 and recognised the composer from somehwere.
When I looked him up I realised just how important his contribution to the organ was. He wrote seven important books about the organ including Modern organ stops 1923
The Modern British Organ 1910
The church organ: an introduction to the study of modern organ-building 1920
The organ reed. The voicing and use of reed pipes 1950
The organ of tradition 1939
Studies in organ tone 1914

More info here;
http://worldcat.org/identities/lccn-n50043902/