18th century Royal warrant commanding the preparation of letters patent granting Robert Barker use for fourteen years of his invention 'La nature a coup d'oeil ... for displaying views of nature ... by oil painting', or 'panorama', Coll-1692, Volume: CLX-A-1324. University of Edinburgh Library Heritage Collections. http://lac-archivesspace-live4.is.ed.ac.uk:8081/repositories/2/resources/85809 Accessed May 07, 2024.