§ 10. The citations given in the works of Sextus Empiricus are important because they are in a measure independent of the Stoic line of tradition; we may even say with confidence that some of them are cited from the original works. For Herakleitos there is only one important series of fragments, namely that found in _adv. Math._ vii. §§ 126-134. Fragments 52 and 54 of Herakleitos are indeed mentioned in a series of epigrams with no name attached to them (_Pyrrh._ i. 55), and a little later (_Pyrrh._ iii. 115 and 230) there is an allusion to the well-known Fr. 42 and a statement of Herakleitos’ opinion as to life and death (cf. Fr. 78). The discussion _adv. Math._ vii. §§ 126-134 is a statement of the doctrine of sense-perception which Sextus attributes to Herakleitos. Diels has given good reasons (_Dox._ 209-211) for believing that this passage is based on Aenesidemus, a skeptic philosopher with strong Herakleitean leanings of the first century B.C. In it are contained the full form of Fr. 2 (cited in part by other writers) and Fr. 4 and 92 (with comment based on a longer passage); there is also a phrase reminding the reader of Fr. 77 in § 130. This is the fullest extant material for reconstructing the introduction to Herakleitos’ book, and was evidently based on the text of Herakleitos. While it is cited quite accurately, it is probable that Sextus took the citation from the same source as the rest of the discussion; still, when we remember Sextus’ fondness for citing proœmiums, we cannot say definitely that he did not take it himself from the work of Herakleitos.