It is generally agreed, I think, that Thucydides is first in order of time of philosophic historians, but it does not seem to me that we have most to learn from him in the philosophic quality. The tracing of cause and effect, the orderly sequence of events, is certainly better developed by moderns than it has been by ancients. The influence of Darwin and the support and proof which he gives to the doctrine of evolution furnish a training of thought which was impossible to the ancients; but Thucydides has digested his material and compressed his narrative without taking the life out of his story in a manner to make us despair, and this does not, I take it, come from paucity of materials. A test which I began to make as a study in style has helped me in estimating the solidity of a writer. Washington Irving formed his style by reading attentively from time to time a page of Addison and then, closing the book, endeavored to write out the same ideas in his own words. In this way his style became assimilated to that of the great English essayist. I have tried the same mode with several writers. I found that the plan succeeded with Macaulay and with Lecky. I tried it again and again with Shakespeare and Hawthorne, but if I succeeded in writing out the paragraph I found that it was because I memorized their very words. To write out their ideas in my own language I found impossible. I have had the same result with Thucydides in trying to do this with his description of the plague in Athens. Now, I reason from this in the case of Shakespeare and Thucydides that their thought was so concise they themselves got rid of all redundancies; hence to effect the reproduction of their ideas in any but their own language is practically impossible.