Rid, Samuel. "Martin Markall, Beadle of Bridewell," in The Elizabethan Underworld, A. V. Judges, ed. pp. 415–416. George Routledge, 1930. Online quotation. See also Spraggs, Gillian: Outlaws and Highwaymen: the Cult of the Robber in England from the Middle Ages to the Nineteenth Century, pp. 107, 169, 190–191. Pimlico, 2001
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Beattie, J. M.: Crime and the Courts in England, 1660–1800, pp. 155–156. Clarendon Press, 1986; Spraggs, Gillian: Outlaws and Highwaymen: the Cult of the Robber in England from the Middle Ages to the Nineteenth Century, p. 93. Pimlico, 2001. Harper, Charles George: Half-hours with the Highwaymen: picturesque biographies and traditions of the "knights of the road", pp. 245–255. Chapman & Hall, 1908; Online edition of Half-hours with the Highwaymen. via Internet Archive.