1 See pp. 187-98.

1 Rostovtzeff, M.: The Social and Economic History of the Roman Empire, pp. 302-5 and 482-5.

1 For a previous discussion of this subject in another aspect see pp. 81-2.

1 Jones, W. H. S.: Malaria and Greek History.

1 The unique case of the Egyptiac Empire, which endured for centuries long after it ought, on all analogies, to have been dead has been discussed on pp. 31-3.

1 See pp. 17-19.

1 Bridges, R.: The Testament of Beauty, Book 1,11. 594-5.