Since Canadian Horses and the original Justin Morgan were virtually identical in every way, breeding Figure and his sons to Canadian mares was a logical way to further strengthen the already dominant characteristics of Justin Morgan the horse. The pure Narragansett was extinct by 1800, but mares with Naragansett blood also were bred to Figure and his sons to intensify the pacing ability inherited from the Canadians. Canadians of this time also may have had a dose of Narragansett added for the same reason. Incidentally, one Justin Morgan son, The Hawkins Horse (foaled ca. 1806). was sent to Quebec, and was bred to local Canadian mares before being taken to northern Canada and disappearing from the record.
The pedigrees of mares were not usually recorded in those early days. Word of mouth was often the only information provided about a mare’s background, and as a result there are different versions of any one horse's pedigree. The following is based on a variety of sources.
The Jennison Horse was a Morgan born in 1840 that went on to found the Morrill line of Morgans, which became incorporated into the Standardbred. He was by Randolph Morgan and out of a Canadian mare. Randolph Morgan was by Bulrush and out of a Canadian mare. Bulrush was by Justin Morgan and out of a Canadian mare. Thus the Jennison Horse was actually 7/8th Canadian.
Billy Root was sired by Justin Morgan's son, Sherman. His dam was a fine road horse with great endurance. She was said to be by Justin Morgan out of a Canadian mare.
Black Hawk, also by Sherman, was out of a black mare born in Nova Scotia. She was said to be of English or Thoroughbred blood, but her black colour (rare in Thoroughbreds, but common in Canadians), endurance, trotting ability and her place of birth suggest she was much more likely to have been a Canadian. Both Billy Root and Black Hawk are found in modern Morgan, Standardbred and Saddlebred pedigrees.
Clearly, Canada’s Little Iron Horse played a key role in helping the remarkable Justin Morgan found a dynasty that continues to this day.