William Wordsworth, Dorothy Wordsworth, Ernest De Selincourt, Alan G. Hill, Chester Linn Shaver (1967). “The Letters of William and Dorothy Wordsworth: Volume VIII. A Supplement of New Letters”, p.51, Oxford University Press on Demand
"The Reaction in Germany" by Mikhail Bakunin (October 1842), signed "Jules Elysard"; as quoted in Mikhail Bakunin "Bakunin on Anarchism" edited and translated by Sam Dolgoff, www.marxists.org. 1971.