Matthew, Henry Colin Gray et al., editors. Oxford Dictionary of National Biography. http://www.oxforddnb.com/.
Goodwin, Albert. The Friends of Liberty: The English Democratic Movement in the Age of the French Revolution. Hutchinson, 1979. 332-3
Goodwin, Albert. The Friends of Liberty: The English Democratic Movement in the Age of the French Revolution. Hutchinson, 1979. 332-3