The invention therefore of Linnæus cannot be called altogether new. That great man informed the king and council in the year 1761, that he had discovered an art by which mussels might be made to produce pearls, and he offered to disclose the method for the benefit of the kingdom. This however was not done, but he disposed of his secret to one Bagge, a merchant at Gottenburg, for the sum of eighteen thousand copper dollars, which make about five hundred ducats. In the year 1780, the heirs of this merchant wished to sell to the highest bidder the sealed-up receipt[768]: but whether the paper was purchased, or who bought it, I do not know; for Professor Retzius at Lund, of whom I inquired respecting it, could not inform me[769]. In the year 1763, it was said in the German newspapers, that Linnæus was ennobled on account of this discovery, and that he bore a pearl in his coat of arms; but both these assertions are false, though Fabricius conjectures that the first may be true[770]. Linnæus received his patent of nobility, which, together with his arms, I have seen, in the year 1756, consequently long before he said anything respecting that discovery, of which the patent does not make the least mention. What in his arms has been taken for a pearl, is an egg, by which M. Tilas, whose business it then was to blazon the arms of ennobled families, meant to represent all nature, after the manner of the ancient Egyptians. The arms are divided into three fields, each of which, by the colour forming the ground, expresses one of the kingdoms of nature; the red signifying the animal, and the green the vegetable, &c. Over the helmet, by way of crest, is placed the _Linnæa_[771]; that beautiful little moth the _Phalæna linneella_, shining with its silvery colours, is displayed around the border instead of festoons; and below is the following motto, _Famam extendere factis_. Linnæus once showed me, among his collection of shells, a small box filled with pearl, and said, “Hos uniones confeci artificio meo; sunt tantum quinque annorum, et tamen tam magni.” “These pearls I made by my art, and though so large they are only five years old.” They were deposited near the _Unio margaritifera_, from which most of the Swedish pearls are procured; and the son, who was however not acquainted with his father’s secret, said the experiments were made only on this kind of mussel, though Linnæus himself assured me that they would succeed on all kinds.