 A description of his works preserved in the Imperial Cabinet at St. Petersburg was given in J. Bernoulli's "Travels", iv.248.Natter published in 1754 "A Treatise on the Ancient Method of Engraving on Precious Stones compared with the Modern", London; it was also published in French in the same year as "Traité de la méthode antique de graver en pierres fines".