1 2 Rosner 2010, p. 66. ↑ Bailey 2002, p. 33. ↑ Knight 2007, p. 22. ↑ Rosner 2010, pp. 25–26. ↑ Dudley Edwards 2014, pp. 100–02. ↑ Roughead 1921, p. 11. 1 2 UK Retail Price Index inflation figures are based on data from Clark, Gregory (2017). "The Annual RPI and Average Earnings for Britain, 1209 to Present (New Series)".