Thomas Robert Malthus.
Principles of Political Economy considered with a View to their Practical
Application.
REFERENCES TO:
Sydney Smith to Lord Grey, 15 April 1820 in A Memoir of the Reverend Sydney Smith. By his Daughter, Lady Holland. With a
Selection from his Letters, edited by Mrs. Austin. 2 vols (London: Longman, Brown, Green, and Longmans, 1855).