C. Müller thinks (in his Annotatio ad Marmor Parium, appended to the Fragmenta Historicorum Græcorum, ed. Didot, pp. 556, 568, 572; compare his Prefatory notice of the Fragments of Hellanikus, p. xxviii. of the same volume) that the ancient chronologists, in their arrangement of the mythical events as antecedent and consequent, were guided by certain numerical attachments, especially by a reverence for the cycle of 63 years, product of the sacred numbers 7 × 9 = 63. I cannot think that he makes out his hypothesis satisfactorily, as to the particular cycle followed, though it is not improbable that some preconceived numerical theories _did_ guide these early calculators. He calls attention to the fact that the Alexandrine computation of dates was only one among a number of others discrepant, and that modern inquirers are too apt to treat it as if it stood alone, or carried some superior authority, (pp. 568-572; compare Clemen. Alex. Stromat. i. p. 145, Sylb.) For example, O. Müller observes, (Appendix to Hist. of Dorians, p. 442,) that “Larcher’s criticism and rejection of the Alexandrine chronologists may perhaps be found as groundless as they are presumptuous,”—an observation, which, to say the least of it, ascribes to Eratosthenês a far higher authority than he is entitled to. “The following Table (says Mr. Clinton) offers a summary view of the leading periods from Phorôneus to the Olympiad of Corœbus, and exhibits a double series of dates; the one proceeding from the date of Eratosthenês, the other from a date founded on the reduced calculations of Phanias and Kallimachus, which strike out fifty-six years from the amount of Eratosthenês. Phanias, as we have seen, omitted fifty-five years between the Return and the registered Olympiads; for so we may understand the account: Kallimachus, fifty-six years between the Olympiad of Iphitus and the Olympiad in which Corœbus won.[71] [71] The date of Kallimachus for _Iphitus_ is approved by Clavier (Prem. Temps, tom. ii. p. 203), who considers it as not far from the truth. “The first column of this Table exhibits the _current_ years before and after the fall of Troy: in the second column of dates the _complete_ intervals are expressed.” Years Years intervening before between the Fall the different B. C. B. C. of Troy. events. Eratosth. Kallimach.