American first professional woman artist, Henrietta Johnston and John singleton Copley are all helped create a distinct culture in the young colonies and both were not formally trained, but I find they have many differences.
First，John singleton Copley is very good to render the distinct textures of hair, flesh, textiles, and other materials and to create the illusion of people and objects in space with dramatic contrasts of light and dark, the work “the boy with squirrel (henry Pelham)” is a good example. His works shows the fancy by borrowing settings, compositions, and costumes from 17th and 18th century English painting style. However, he changed his portrait style to the more painterly British approach, shifted his emphasis from portraiture