About the author
Cecil Bernard Rutley wrote adventure stories for children, amongst which is The Secret of the Range, which has a little horse content.
Finding the book
Reasonably easy to find.
Sources and links
British Library
Bibliography (pony books only)
The Secret of the Range
Blackie, London
Jill and Shirley, twins and orphans, find themselves owners of a cattle ranch in Argentina. The twins are tired of their jobs in London, and they decide to go and take charge. When they get there, it is obvious there is something wrong, and much drama ensues.