"John Avery (c. 1738\u20131808) was one of the main organ builders in England during the late 18th and early 19th centuries."@en . "38928620"^^ . . . . . . . . . "John Avery (organ builder)"@en . . . . . . . . . . . "3399"^^ . . . . . . . . . . . . . "1077135336"^^ . . . "John Avery (c. 1738\u20131808) was one of the main organ builders in England during the late 18th and early 19th centuries."@en . . . . . . . . . . . . . . . . . . . . . .