It is certain, at least, that the age (670-600) immediately succeeding Terpander,—comprising Archilochus, Kallinus, Tyrtæus, and Alkman, whose relations of time one to another we have no certain means of determining,[147] though Alkman seems to have been the latest,—presents a remarkable variety both of new metres and of new rhythms, superinduced upon the previous daktylic hexameter. The first departure from this latter is found in the elegiac verse, employed seemingly more or less by all the four above-mentioned poets, but chiefly by the first two, and even ascribed by some to the invention of Kallinus. Tyrtæus in his military march-songs employed the anapæstic metre, but in Archilochus as well as in Alkman we find traces of a much larger range of metrical variety,—iambic, trochaic, anapæstic, ionic, etc.,—sometimes even asynartetic or compound metres, anapæstic or daktylic, blended with trochaic or iambic. What we have remaining from Mimnermus, who comes about the close of the preceding four, is elegiac; his contemporaries Alkæus and Sappho, besides employing most of those metres which they found existing, invented each a peculiar stanza of their own, which is familiarly known under a name derived from each. In Solon, the younger contemporary of Mimnermus, we have the elegiac, iambic, and trochaic: in Theognis, yet later, the elegiac only. But both Arion and Stesichorus appear to have been innovators in this department, the former by his improvement in the dithyrambic chorus or circular song and dance in honor of Dionysus,—the latter by his more elaborate choric compositions, containing not only a strophê and antistrophê, but also a third division or epode succeeding them, pronounced by the chorus standing still. Both Anakreon and Ibykus likewise added to the stock of existing metrical varieties. And we thus see that, within the century and a half succeeding Terpander, Greek poetry (or Greek literature, which was then the same thing) became greatly enriched in matter as well as diversified in form. [147] Mr. Clinton (Fasti Hellen. ad ann. 671, 665, 644) appears to me noway satisfactory in his chronological arrangements of the poets of this century. I agree with O. Müller (Hist. of Literat. of Ancient Greece, ch. xii, 9) in thinking that he makes Terpander too recent, and Thalêtas too ancient; I also believe both Kallinus and Alkman to have been more recent than the place which Mr. Clinton assigns to them; the epoch of Tyrtæus will depend upon the date which we assign to the second Messenian war.