I am looking for a children’s/YA horse story from the late fifties or early sixties. It features a somewhat broken down horse named Black Baldwin, who was bought/adopted by an eleven year old girl desperate to have a horse. She rehabilitates him and eventually wins second prize in some kind of horse show event. The book had small pen and ink drawings throughout. I don’t remember the book jacket though, I believe it had one.
I searched for a long time thinking the horse’s name was the title of the book. Either it is and every copy is long gone, or there is some other title.