Clinton Keeling/Ashover Zoological Gardens

I am presently accumulating information and material to see if enough is available for me to write a biography of the zoologist Clinton H Keeling (1932-2007) who created and ran Ashover Zoological Gardens (also called Pan’s Garden) in Derbyshire from 1955 to 1971 and visited countless schools throughout the country with his animals.  I would be delighted to hear from anyone who may have reminiscences, photographs or any other relevant information.