As might be imagined, Voltaire had slight sympathy with our social reformer's notions and ways of promulgating them, and accordingly took up his wonted weapons--sarcasm and ridicule--against poor Jean-Jacques. The quarrels of these two great men cannot be described in this place; but they constitute an important chapter in the literary and social history of the time. In the work with which we are immediately concerned, the author seems to avoid frequent mention of Voltaire, even where we should most expect it. However, the state of his mind when he penned this record of his life should be always remembered in relation to this as well as other occurrences. Rousseau had intended to bring his autobiography down to a later date, but obvious causes prevented this: hence it is believed that a summary of the chief events that marked his closing years will not be out of place here. On quitting the Ile de Saint-Pierre he travelled to Strasbourg, where he was warmly received, and thence to Paris, arriving in that city on December I6, 1765. The Prince de Conti provided him with a lodging in the Hotel Saint-Simon, within the precincts of the Temple--a place of sanctuary for those under the ban of authority. 'Every one was eager to see the illustrious proscript, who complained of being made a daily show, "like Sancho Panza in his island of Barataria." During his short stay in the capital there was circulated an ironical letter purporting to come from the Great Frederick, but really written by Horace Walpole. This cruel, clumsy, and ill-timed joke angered Rousseau, who ascribed it to, Voltaire. A few sentences may be quoted: "My Dear Jean-Jacques,--You have renounced Geneva, your native place. You have caused your expulsion from Switzerland, a country so extolled in your writings; France has issued a warrant against you: so do you come to me. My states offer you a peaceful retreat. I wish you well, and will treat you well, if you will let me. But, if you persist in refusing my help, do not reckon upon my telling any one that you did so. If you are bent on tormenting your spirit to find new misfortunes, choose whatever you like best. I am a king, and can procure them for you at your pleasure; and, what will certainly never happen to you in respect of your enemies, I will cease to persecute you as soon as you cease to take a pride in being persecuted. Your good friend, "FREDERICK."