While there were horses in the Americas well before Figure (The Justin Morgan Horse), and even earlier 'breeds' developed in what is now the United States (the Narraganset Pacer comes to mind), Figure's timely birth along the his astounding versatility, and the all-important ability to pass on his traits, are what allowed the Morgan Horse to become the first truly American (as in U.S.) breed. This stud ad was recently posted by The Morgan Horse Museum. The ad is by Justin Morgan himself, when Figure was about five years old.
There are two things I'd like to point out about this ad. This first is the fee- $1. While this seems like a ridiculously tiny fee to us, "full-blooded" (i.e. Thoroughbred) stallions of the time often stood for only $5, and only imported champions were likely to command more than $25. Figure was of course not full blooded, but rather an unregistered and unregisterable "sport," and at this point still rather young. So with only a couple of seasons of accomplishments, a scant handful of foals on the ground (with possibly none ready to be ridden), and his "strength, beauty, and activity," he merits a full dollar fee and being stood in two towns in the same season (a common practice for quality studs).
The second, and related, item is the complete and utter lack of pedigree information. While most stud ads contain at least sire and damsire, Justin Morgan is silent. Given the currently accepted theory that his sire was the stolen True Briton, and his dam a mare by Diamond (great grandson of Cade, via Wildair), this lack is startling.* I have long favored the Dutch theory, most famously supported by the late great Jeanne Mellin, and this ad's peculiar silence further suggests that Figure was not largely thoroughbred.**
*See the Morgan Horse Register, Vol 1. Notably, True Briton and Wildair were both owned by Col. James De Lancey.
**His current "official" pedigree is 3/4 early Thoroughbred (more like today anglo-Arabs, or even Akhal-Tekes) and 1/8 Arabian, though there is some question as to wether his damsire Diamond was in fact full blooded. Even if Diamond was only half Thoroughbred himself, that would still make Figure 5/8 Thoroughbred and 1/8 Arabian.