A large number of his original drawings and paintings were destroyed when the building where he was exhibiting them in New York City caught fire, but a number survive in museums and private collections, often showing more detail than the published engravings.
Et stort antal af hans originale tegninger og malerier blev ødelagt, da bygningen hvori han udstillede dem i New York City brød i brand, men nogle er bevaret på museer og i private samlinger, ofte med en større detaljerigdom end de udgivne graveringer.