Famine related data from:
Fotheringham, A.S., Kelly M. and Treacy C. (2011) NCG Online Atlas Portal: Irish Famine Data Atlas, downloaded May 5, 2013
Dowling, M.W., Queen's University of Belfast. Department of Economic and Social History. Database of Irish Historical Statistics. Retrieved from the UK Data Archive [distributor], July, 2014, downloaded May 5, 2013 and
Joel Mokyr. (1985) Why Ireland Starved: A Quantitative and Analytic History of the Irish Economy, 1800-1850. London: George Allen and Unwin.