Abelard, New York, 1962, 160 pp, illus Charles Keeping
Eddie must earn fifteen dollars towards the replacement of the trumpet he lost before he can start taking riding lessons on the Welsh ponies at the new riding school in town.
Ruth Forbes Chandler (1894 - 1978) is an author about whom, alas I’ve been able to find no biographical information. She appears to have written several children’s books, of which Three Trumpets is a horse story. It’s illustrated by the fine English artist, Charles Keeping.
Finding the book: not many copies about, but they’re not particularly expensive.