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the dates that should be assigned to the nativity of the philosophers. The only exception appears to occur with reference to the three Athenian philosophers, i.e., Socrates, Plato and Aristotle, the date of whose nativity is believed to be certain, and concerning which there is general agreement among historians.

However, when we come to deal with the pre-Socratic philosophers, we are confronted with confusion and uncertainty, and a few examples would serve to illustrate the untrustworthy nature of the chronology of Greek Philosophers.

(1) Diogenes Laertius places the birth of Thales at 640 B.C., while William Turner's History of Philosophy places it as 620 B.C.; that of Frank Thilly at 624 B.C.; that of A. K. Rogers at early in the sixth century B.C.; and that of W. G. Tennemann at 600 B.C.

(2) Diogenes Laertius places the birth of Anaximenes at 546 B.C.; while W. Windelbrand places it at the sixth century B.C.; that of Frank Thilly at 588 B.C.; that of B. D. Alexander at 560 B.C.; while that of A. K. Rogers at the sixth century B.C.

(3) Parmenides is credited by Diogenes as being born at 500 B.C.; while Fuller, Thilly and Rogers omit a date of birth, because they say it is unknown.

(4) Zeller places the birth of Xenophanes at 576 B.C.; while Diogenes gives 570 B C.; and the majority of the other historians declare that the date of birth is unknown.

(5) With reference to Xeno, Diogenes who does not know the date of his birth, says that he flourished between B.C. 464-460; while William Turner places it at 490 B.C.; like Frank Thilly and B. D. Alexander; while Fuller, A. K. Rogers and W. G. Tennemann declare it is unknown.

(6) With references to Heraclitus, Zeller makes the following suppositions: if he died in 475 B.C. and if he was sixty years old when he died, then he must have been born in 535 B.C.; similarly Diogenes supposes that he flourished between B.C. 504-500; and while William Turner places his birth at 530 B.C.; Windelbrand places it at 536 B.C.; and

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