Not the least pleasure in reading a book so vital and imaginative as Mr. Cornford's lies in the vitalising effect it has on the imagination of the reader. The results may or may not be correct: Mr. Cornford may or may not agree with them: but it is perhaps the best of compliments to a writer that he should produce such an effect at all. In the present instance his masterly analysis of the character and significance of Cleon as an actor in Thucydides’ historic drama has suggested an interpretation of Pericles’ position in the tragedy, which, though somewhat different from Mr. Cornford's own estimate of that great figure, is yet in accordance with his general conception of the work as a whole, designed to show Retribution following on overbearing Ambition and overweening Desire. From the time of Grote this conception has been familiar enough in outline, but Mr. Cornford fills it in with a wonderful richness of detail and illustration, and in particular draws a striking parallel with the vast scheme of Retribution in the Oresteia.