 Chrétien's workshop was taken over by Edme Bouchardy.In 1802, John Isaac Hawkins, who was born in England in 1772 and who lived in Philadelphia, Pennsylvania, patented the second official physiognotrace, and partnered with Charles Willson Peale to market it to prospective buyers.John Hawkins's machine differed from Chrétien's in that it traced around the actual face with a small bar connected to a pantograph that reduced the silhouette to less than 2 inches.