Christoph Jacob Trew (1695-1769: Plantae selectae qvarvm imagines ad exemplaria natvralia londini in hortis cvriosorvm (1750/73, supplement 1790) ; apothecary Johann Wilhelm Weinmann (1683-1741) ; Thomas Pennant: Brit Zoology (1782, German ed.) ; Georg Wolfgang Knorr (1705-1761) ; Jacob Christian Schaeffer (1718-1790) ;
Johann Jakob Haid ; Johann Elias Ridinger ; Bartholomäus Seuter ; artist Anton Graff ;
botanical engraving, mezzotint, and drawing ; portraits
