WATSON gave up his pursuits in chemistry the instant he obtained their limited reward, and the laboratory closed when the professorship was instituted. Such was the penurious love he bore for the science which he had adopted, that the extraordinary discoveries of thirty years subsequent to his own first essays could never excite even an idle inquiry. He tells us that he preferred "his larches to his laurels:" the wretched jingle expressed the mere worldliness that dictated it. In the same spirit of calculation with which he had at first embraced science and literature, he abandoned them; and his ingenuous confession is a memorable example of that egotistic pride which betrayed in the literary character the creature of selfism and political ambition. We are accustomed to consider WILKES merely as a political adventurer, and it may surprise to find this "city chamberlain" ranked among professed literary characters: yet in his variable life there was a period when he cherished the aspirations of a votary. Once he desired Lloyd to announce the edition of Churchill, which he designed to enrich by a commentary; and his correspondence on this subject, which has never appeared, would, as he himself tells us, afford a variety of hints and communications. Wilkes was then warmed by literary glory; for on his retirement into Italy, he declared, "I mean to give myself entirely to our friend's work, and to my History of England. I wish to equal the dignity of Livy: I am sure the greatness and majesty of our nation demand an historian equal to him." They who have only heard of the intriguing demagogue, and witnessed the last days of the used voluptuary, may hardly imagine that Wilkes had ever cherished such elevated projects; but mob-politics made this adventurer's fortune, which fell to the lot of an epicurean: and the literary glory he once sought he lived to ridicule, in the immortal diligence of Lord Chatham and of Gibbon. Dissolving life away, and consuming all his feelings on himself, Wilkes left his nearest relatives what he left the world--the memory of an anti-social being! This wit, who has bequeathed to us no wit; this man of genius, who has formed no work of genius; this bold advocate for popular freedom, who sunk his patriotism in the chamberlainship; was indeed desirous of leaving behind him some trace of the life of an _escroc_ in a piece of autobiography, which, for the benefit of the world, has been thrown to the flames.