The danger attending an enlightened and free people, from a national intercourse with those, who live under an idolatrous religion, and despotick government : A sermon preached at Aldgate-Church, in London, on Friday, the 27th of April, 1753, before the Honourable Edward Vernon, Esq; grand president, and the several laudable associations of Anti-Gallicans. By John Free, D.D. Vicar of Runcorn in Cheshire, and lecturer of Newington in Surry.