No man of eminence, in any department of science or literature, has been without enemies. Linnaeus could not, therefore, expect to become an exception to the general rule. It is doubtful whether Haller manifested more kindness or enmity towards him; or it may be said that though he remained his friend, he yet took many opportunities of uttering censure. A more violent opponent appeared in Heister, professor at Helmstadt, who, imagining himself a great botanist, was offended by the pretensions of the Swedish naturalist, and stirred up one of his pupils, Dr Siegesbeck, a man of even less knowledge than his master, to fight his battle for him. The representations of this last had, for a time, considerable influence over the fortunes of Linnaeus, and Heister secretly rejoiced at his success; while he excited partisans every where to wage war against the sexual system. Other adversaries started up in Germany, France, and various parts of Europe. The only open antagonist whom he had in his own country was the celebrated Wallerius, the mineralogist; in order to counteract whose unfair criticisms he published a pamphlet entitled Orbis Eruditi Judicium de Car. Linnaei, M.D. Scriptis,--The Judgment of the Learned World on the Writings of Charles Linnaeus, M.D. This is the only defence that he ever made of himself, and the only work which he published anonymously. It contained merely a short sketch of his life, a list of the books published by him, and testimonials and opinions of celebrated individuals respecting his merits. Whatever vexation these attacks may have given him, they had no permanent influence, and he had the happiness of triumphing over all opposition. With reference to the attacks of Siegesbeck, he thus writes from Hartecamp to Haller:--