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John Henley (3 August 1692 – 13 October 1756), English clergyman, commonly known as 'Orator Henley', was a preacher known for showmanship and eccentricity.
The son of a vicar, John Henley was born in Melton Mowbray. After attending the grammar schools of Melton and Oakham, Rutland, he entered St John's College, Cambridge, "Ye College where I had ye Stupidity to be educated," as he himself said. After having taken a B.A. degree, he became assistant and, afterwards, director in the grammar school of Melton Mowbray. He was also assistant curate there.
In November 1721, after being promoted to an M.A. degree, he moved to London, where he obtained the appointment of assistant preacher and wrote several books. Quarrelling with the Bishop of London, he gave up his benefice, and began his lectures or 'Orations' on theological subjects and mundane matters. In 1723 he became Rector of Chelmondiston, Suffolk.
On 3 July 1726 Henry opened his so-called 'Oratory', a meeting room built over the shambles in Newport Market. In 1729, he transferred the scene of his operations to an old theater at Clare Market, near Lincoln's Inn Fields, where he continued to preach "on the world as it is, serious or ridiculous." "The Truth of the Gospel is in its Spirit and Moral, its practical Graces," he said, " the rest is, in Comparison, as sounding Brass, or as a tinkling Cymbal." His discourses were popular and subject to rowdy disturbances. Into his services he introduced many peculiarities. He drew up a 'Primitive Liturgy,' in which he substituted for the Nicene and Athanasian creeds, two creeds taken from the Apostolical Constitutions; for his 'Primitive Eucharist' he made use of unleavened bread and mixed wine; and, most interestingly, he distributed medals of admission to his 'Oratory' at the price of one shilling. A visitor accused Henley that money was the god whom he worshipped: "we must give One Shilling to the Door-Keeper, for the Seats were personal Property. A very fine Story indeed! And such a one, that is not to be paralleled, that we should pay a Shilling before we can worship GOD!"
"great restorer of the good old Stage
Preacher at once and Zany of thy age."
He possessed oratorical ability and adopted a theatrical style of elocution, tuning his voice and balancing his hands. His addresses were a medley of solemnity and buffoonery. The Connoisseur, a critical weekly paper, wrote that
"the Clare-Market Orator, while he turns religion into farce, must be considered as exhibiting shews and interludes of an inferior nature, and himself regarded as a Jack-pudding in a gown and cassock."
Despite all criticism, the energetic and eccentric 'Orator' was popular with most Londoners. His services were much frequented by the Freethinkers, and he himself expressed his determination "to die a rational." He died in London on 13 October 1759.
In 1714, he wrote a poem styled Esther, Queen of Persia, which was received with applause, and in 1719–1721, he published The Compleat Linguist; or, An Universal Grammar of all the Considerable Tongues in Being. For some years Henley edited the Hyp Doctor, a weekly paper established in opposition to the Craftsman. In 1726 he published The Primitive Liturgy: for the Use of the Oratory 
- "Henley, John (HNLY709J)". A Cambridge Alumni Database. University of Cambridge.
- Chisholm, Hugh, ed. (1911). "Henley, John". Encyclopædia Britannica (11th ed.). Cambridge University Press
- http://books.google.com/books?id=8_1bAAAAQAAJ&pg=PA35#v=onepage&q&f=false The Primitive Liturgy: for the Use of the Oratory, John Henley, 1726. (Google books link is to Third Edition, 1727.)
- Graham Midgley, The Life of Orator Henley (Oxford, 1973).