The presents which he received from his admirers, the fees of his pupils, his salary, and the property which he had acquired by marriage, rendered him one of the richest of the Upsal professors; and, during the latter period of his life, his stated income was doubled by order of the king. The emoluments which he derived from his works were not great, as he got only for each printed sheet the small sum of one ducat, or about nine shillings and sixpence sterling. To add to his happiness, his son, at the age of twenty-one, was appointed his assistant and successor, shortly after he himself had received letters of nobility, which were antedated four years. In 1748, Frederick I. had founded the order of the Polar Star for men of merit in the civil line, and Linnaeus was the first who was admitted into it by his successor, Frederick Adolphus. He proposed for his arms the three fields of nature, black, green, and red, surmounted by an egg, with the Linnaea for a crest; but the keeper of the great seal adopted a different arrangement. The Diet at the same time bestowed on him a reward of upwards of L520 sterling, for his discovery relative to the production of pearls; and it is even asserted that his elevation to the rank of nobility was not given on account of his botanical labours, or his general merits, but for this alleged discovery, which, however, has turned to no account. But the interest which we have felt in the progress of this great man now begins to be less intense. He seems to us to have accomplished his destiny, and we prepare to trace his steps to the grave. In his domestic life he is supposed to have been subjected to many mortifications, arising from the parsimony and domineering temper of his wife. Long before this period, too, he had become subject to attacks of rheumatism, gravel, and gout; while his too-sensitive mind was harassed by the open as well as more insidious attacks of his opponents. It is pleasing to witness the reconciliation of enemies, and we have already remarked that Linnaeus and his old antagonist Rosen were ultimately on the most friendly terms. "In 1764," says the private manuscript, "he was attacked by a violent pleurisy. He was anxiously attended by Dr Rosen, who saved him from certain death. From this time he conceived the most sincere affection for his brother-professor." Before proceeding to convey the prince of naturalists to the tomb, it seems expedient to examine the most important of his numerous works,--that, namely, in which he arranges all the known objects of nature, and of which the last edition, brought out under his own inspection, appeared about this epoch of his life. SECTION VIII. _Account of the Systema Naturae of Linnaeus._