He then returned to ecclesiastical history, and began to retouch his Account of Heresies, which he had begun at Schwabach:  on this occasion he read the primitive writers with great accuracy, and formed a project of regulating the chronology of those ages; which produced a Chrono-logical Dissertation on the succession of the Bishops of Rome, from St. Peter to Victor, printed in Latin at Utrecht, 1740.

He afterwards was wholly absorbed in application to polite literature, and read not only a multitude of writers in the Greek and Latin, but in the German, Dutch, French, Italian, English, and Arabick languages, and, in the last year of his life, he was engrossed by the study of inscriptions, medals, and antiquities of all nations.

In 1737 he resumed his design of finding a certain method of discovering the longitude, which he imagined himself to have attained by exact observations of the declination and inclination of the needle, and sent to the academy of sciences, and to the Royal society of London, at the same time, an account of his schemes; to which it was first answered by the Royal society, that it appeared the same with one which Mr. Whiston had laid before them; and afterwards by the academy of sciences, that his method was but very little different from one that had been proposed by M. de la Croix, and which was ingenious, but ineffectual.

Mr. Barretier, finding his invention already in the possession of two men eminent for mathematical knowledge, desisted from all inquiries after the longitude, and engaged in an examination of the Egyptian antiquities, which he proposed to free from their present obscurity, by deciphering the hieroglyphicks, and explaining their astronomy; but this design was interrupted by his death.

P. 384. Confidence and tranquillity.

Thus died Barretier, in the 20th year of his age, having given a proof how much may be performed in so short a time by indefatigable diligence.  He was not only master of many languages, but skilled almost in every science, and capable of distinguishing himself in every profession, except that of physick, from which he had been discouraged by remarking the diversity of opinions among those who had been consulted concerning his own disorders.

His learning, however vast, had not depressed or overburdened his natural faculties, for his genius always appeared predominant; and when he inquired into the various opinions of the writers of all ages, he reasoned and determined for himself, having a mind at once comprehensive and delicate, active and attentive.  He was able to reason with the metaphysicians on the most abstruse questions, or to enliven the most unpleasing subjects by the gaiety of his fancy.  He wrote with great elegance and dignity of style, and had the peculiar felicity of readiness and facility in every thing that he undertook, being able, without premeditation, to translate one language into another.  He was no