Thelma Harrington Bell (1896-1985)

Award winning American author born in 1896 in Detroit. She worked as a copywriter before teaming up with husband Corydon Bell to embark upon a successful career writing children's novels. Corydon was a talented artist who illustrated her books and also collaborated with her on some of them.

I don't know what interest Ms. Bell had in horses, but she obviously liked animals, as a number of her books were animal-themed, although just one a pony story.

Pony Books:

A DASH OF PEPPER
(VIKING [USA] 1965)
ILLUSTRATED BY CORYDON BELL
Reprinted by Viking in 1966
SUMMARY: Clyde desperately wants to buy the beautiful pony Pepper, but a past family tragedy puts a hold on his dreams.

Collector's Info:
Easy to find in America and usually low cost. A lot harder to get hold of elsewhere.