KEYSLER (John George), a learned German antiquarian, was born at Thourneau, in 1689. After studying at the university of Halle, he was appointed preceptor to Charles Maximilian, and Christian Charles, the young counts of Giech Buchau; with whom he travelled through the chief cities of Germany, France, and the Netherlands, gaining great reputation among the learned as he went along, by illustrating several monuments of antiquity, particularly some fragments of Celtic idols lately discovered in the cathedral of Paris. Having acquitted himself of this charge with great honour, he procured, in 1716, the education of two grandsons of Baron Bernstorff first minister of state to his Britannic majesty as elector of Brunswick-Lunenburg. However, obtaining leave, in 1718, to visit England, he was elected a fellow of the Royal Society for a learned essay De Dea Nebelennia numine veterum Walachorum topico: he gave also an explanation of the ancient monument on Salisbury plain called Stono-henge, with A dissertation on the consecrated mistletoe of the Druids. Which detached essays, with others of the same kind, he published on his return to Hanover, under the title of Antiquitates selecte Septentrionales et Celtice, &c. He afterwards made the grand tour with the young barons, and to this tour we owe the publication of his travels; which were translated into English, and published in 1756, in 4 vols. 4to. Mr Keyser, on his return, spent the remainder of his life under the patronage of his noble pupils, who committed their fine library and museum to his care, with a handsome income. He died in 1743.