The Godolphin Barb (1724-1754)
There never was a horse (at least, that I have seen) so well entitled to get racers as the Godolphin Arabian; for, whoever has seen this
horse must remember that his shoulders were deeper, and lay farther into his back, than those of any horse ever yet seen.

Behind the shoulders, there was but a very small space ere the muscles of his loins rose exceedingly high, broad, and expanded,
which were inserted into his hindquarters with greater strength and power than in any horse I believe ever yet seen of his dimensions,
viz fifteen hands high."   The veterinary surgeon Osmer, as quoted by Prior.

The famous Eclipse traces his sire line to the Darley Arabian, but his dam was a daughter of Regulus, of Godolphin blood.
This pattern is yet evident today, with the Godolphin Arabian more heavily represented in the dam lines of many champions.