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N. C. Phillips, Edmund Burke and the County Movement, 1779–1780, The English Historical Review Vol. 76, No. 299 (April 1961), pp. 254–278 at p. 266. Published by: Oxford University Press JSTOR557542
Anthony Page, Rational Dissent, Enlightenment, and Abolition of the British Slave Trade, The Historical JournalVol. 54, No. 3 (September 2011), pp. 741–772, at p. 760. JSTOR23017270