Mary Graham Bonner (1890-1974)

American author of children's books. She was fairly prolific, writing a number of non-fictional and also some fictional works for children, mainly adventures/mysteries. She wrote one pony book, which was a story about a police horse, which is unfortunately now fairly hard to find.

I don't have a picture of this book so anyone can supply one I would be very grateful.

Horse & Pony Books:

SIR NOBLE THE POLICE HORSE
(KNOPF [USA] 1940)
ILLUSTRATED BY PHOTOGRAPHS
Reprinted in hardback by original publisher
SUMMARY: The story of Sir Noble who trains to become a police horse in New York. Most likely based on a true story.

Collector's Info:
Fairly rare in America, very rare outside of the USA. Price can vary a lot, some copies are expensive.