books from the library of the Abbe Bignon, of which he had the care. It is certain that he knew the value of the scarcest works, and was one of those lovers of bibliography who trade at times in costly rarities. At Vienna he became intimately acquainted with the poet Rousseau, and Prince Eugene. The prince, however, who suspected the character of our author, long avoided him. Lenglet insinuated himself into the favour of the prince's librarian; and such was his bibliographical skill, that this acquaintance ended in Prince Eugene laying aside his political dread, and preferring the advice of Lenglet to his librarian's, to enrich his magnificent library. When the motive of Lenglet's residence at Vienna became more and more suspected, Rousseau was employed to _watch_ him; and not yet having quarrelled with his brother spy, he could only report that the Abbe Lenglet was every morning occupied in working on his "Tablettes Chronologiques," a work not worthy of alarming the government; that he spent his evenings at a violin-player's married to a Frenchwoman, and returned home at eleven. As soon as our historian had discovered that the poet was a brother spy and newsmonger on the side of Prince Eugene, their reciprocal civilities cooled. Lenglet now imagined that he owed his six months' retirement in the citadel of Strasburgh to the secret officiousness of Rousseau: each grew suspicious of the other's fidelity; and spies are like lovers, for their mutual jealousies settled into the most inveterate hatred. One of the most defamatory libels is Lenglet's intended dedication of his edition of Marot to Rousseau, which being forced to suppress in Holland, by order of the States-general; at Brussels, by the intervention of the Duke of Aremberg; and by every means the friends of the unfortunate Rousseau could contrive; was, however, many years afterwards at length subjoined by Lenglet to the first volume of his work on Romances; where an ordinary reader may wonder at its appearance unconnected with any part of the work. In this dedication, or "Eloge Historique," he often addresses "Mon cher Rousseau," but the irony is not delicate, and the calumny is heavy. Rousseau lay too open to the unlicensed causticity of his accuser. The poet was then expatriated from France for a false accusation against Saurin, in attempting to fix on him those criminal couplets, which so long disturbed the peace of the literary world in France, and of which Rousseau was generally supposed to be the writer; but of which on his death-bed he solemnly protested that he was guiltless. The _coup-de-grace_ is given to the poet, stretched on this rack of invective, by just accusations on account of those infamous epigrams, which appear in some editions of that poet's works; a lesson for a poet, if poets would be lessoned, who indulge their imagination at the cost of their happiness, and seem to invent crimes, as if they themselves were criminals.