Another author who only wrote one pony book under that name. She was very fortunate with her illustrator, Myrtle Jerrett. She did the covers for three of Enid Blyton’s Sunny Stories, and also illustrated three stories for the magazine. She wrote and illustrated Selwyn the Sea Lion. The illustration below, to the left, I think is a forerunner of Sheila Rose’s style.
Many thanks to Sarah Beasley for the picture of the dustjacket.
Finding the book: reasonably easy to find, but can be expensive with its dustjacket.