Although most of this artists had certain special interests in different areas only Peale was infatuated by the fossils and animal specimens. Therefore, he is also a founder of a famous Pennsylvania Museum, where the first skeleton of mastodon was displayed. That is why this museum is also known as Peale Museum.
Gouache is a type of watercolor in which white pigment is added, creating a duller effect and a tinted feel with a smooth finish. The paint usually comes in tubes, with which the artist must add the vehicle (water).