[http://www.nga.gov/content/ngaweb/research/casva/research-projects.html A Project of the National Gallery of Art, Center for Advanced Study in the Visual Arts ]
last paragraph. "which it fell" delete it
maybe mention at top contributed to defining many relevant landscape and botanical terms.
Can we say something about its relevance to this American project? That it was frequently cited in or found in many libraries or collections? why is it relevant?