According to George Washington’s diary, Colonel John Cox sat for the finishing touches on this miniature at Valley Forge on April 23, 1778. At the time, Peale was a captain in the same company. Cox took the oath of allegiance at Valley Forge earlier that year, and served as the company’s assistant quartermaster general. A Philadelphia merchant, Cox owned Batsto Furnace in New Jersey, which produced munitions for the Continental army. Conservation of this miniature was made possible through a generous grant provided by the Smithsonian Women’s Committee.