The Home Railway Journal is a quarterly US based magazine focussed on 4.75 inch and larger gauge railways. The Corris Hill Railway appears in the Fall 2007 edition.
The Shire Book of Miniature Railways by Michael Crofts, owner of the Perrygrove Railway, published in July 2002. This small book is an excellent introduction to the world of miniature railways (and features the Corris Hill Railway too!).