The early American farm horse helped build the country, as described in the book Farmer Boy by Laura Ingalls Wilder. The Wilders were successful and relatively wealthy farmers. Their barns (yes, more than one) are described in detail and they owned a herd of horses. The purebred Morgans also brought in quite a lot of money each year when Pa Wilder sold matched pairs of horses to New York City horse buyers. The Ingalls in contrast felt lucky to have even a single team of horses instead of oxen. The Ingalls horses, Sam and David, were not described by breed or even appearance, but they were just as important to the Ingalls as the purebred Morgans were to the Wilders. Sam and David were likely mixed breed horses which did not make them any less useful or less of a farm horse.