Wikipedia says that San Dominigo: the Medicine Hat Stallion was the first title and that Peter Lundy and the Medicine Hat Stallion was a later edition's title.

Was Peter Lundy a different title for Santo Domingo, the Medicine Hat Stallion or was it a completely different book with similar characters?

Didn't it get published under both titles. I know that I was older when it came out and had to check it out from the kids section of the library, which when you are a teenager was cause for making up elaborate stories about babysitting tiny tots.

eta: context

I've been to Chincoteague and have seen Misty's stall. You may bask in my aura.

(Back in the '60s, the old person at the farm at the air of "Oh, god, more tourists, I'm so tired of traipsing out to the barn to point at that little sign.")

I'm still bitter that despite actually living in Maryland my family never made it to Pony Penning Day. I'm sure that had Chincoteague been the site of a Civil War battle we'd have been there every summer.

I loved Justin Morgan, too (I never knew it was also a movie!) I will go off about the awesomeness of morgans with very little notice. It's almost as bad as when I get started on percherons.

Ooh, Percherons!

There was a lovely team of Percheron/Thoroughbred crosses driven by a US woman.

Also, some lovely Percherons in the Vaulting.

Okay, since we're on horse books, does anyone remember a series about a camp where the girls all owned Palominos? They might have been mysteries, but I honestly don't remember.

Oh! I can picture the cover. I don't think I read it but I affirm its existence.

I don't recall that one.

But I went to the horse book website and found this page of Wesley Dennis illustrations for Black Beauty. I seem to recall that lovely cover picture.

(Back to Henry: anyone else read Black Gold?)

And a link to a page of Dennis covers. I swear I read all of those books!