Wow! I can’t believe I looked at this-we had a mare that was by HS Thirty Thirty (she came out of Canada, too, like him). She was buckskin and went grey. I would have killed to have bred her to a crazy-talented TB sporthorse, because she was very uphill and really cool (injured as a foal and never broke), but, sadly, she died. She was not very QH-y, and had a very strong, long hind leg. I can’t remember her damline without digging out her papers.
Windchester was a well-known sire of performance/show horses, I believe.
Off the top of my head (I’m no scholar on QH lines, for sure), I love the Peppy San/cow on the bottom because all the QH’s I’ve seen that jumped awesome and/or were true sporthorse type (not the spindly hunter under saddle types) had very foundation cow on one side. The really good cow horses are real athletes. So, I think it’s interesting, for sure.