1. Diog. Laert. V 6, 88: ῥητορικὰ δέ· περὶ τοῦ ῥητορεύειν ἢ Πρωταγόρας.

Eiusdem extitisse τέχνην ῥητορικήν a posterioribus ignoratam Barwickii argumentatio vel potius divinatio (Herm. 57, 40 sq.) persuadere mihi nullo modo potuit.


2. Antiphanes ἐν Καρσί, Mein. frg. cοm. Gr. III, p. 59 (Athen. 134 b):

οὐχ ὁρᾷς ὀρχούμενον

ταῖς χερσὶ τὸν βάκηλον, οὐδʼ αἰσχύνεται

ὁ τὸν Ἡράκλειτον πᾶσιν ἐξηγούμενος,

ὁ τὴν Θεοδέκτου μόνος ἀνευρηκὡς τέχνην,

ὁ τὰ κεφάλαια συγγράφων Εὐριπίδῃ.

Heraclidem Ponticum his versibus denotari Trendelenburg apud Meinekium l. l. demonstrare conatus est. Sed Θεοδέκτου τέχνη non potest esse Aristotelis rhetorica Theodectea, v. infra s. v. Θεοδέκτης, ac vel ideo quod Euripides sequitur, tragicam artem Theodectae tangi probabile est, Heraclidis praeceptis nutritam. Nihil denique apud Meklerum in Indice Philosophorum Academicorum Hercul. repperi, quod ad Heraclidis rhetorican referri posset.

3. Philodem. περὶ ποιημάτων, Pap. 1425 col. VII 11 (C Jensen, Herakleides vom Pontos bei Philodem und Horaz. Berl. S. B., phil. hist. Kl. 1936 XXIII 308) de Heraclide: κατὰ [τὸ ἡδ]ὺ τό τε εὐπ[ρεπ]ῶς ἅμ[α καὶ εἰκα]στικῶ[ς πά]ντʼ ἂν εἴ[η κοινὰ καὶ πο]ιημάτων καὶ [λό]γων.

Poetae “simplicis” esse officium persuadere teste Philodemo idem Heraclides docuerat (ibd. col. VI 32). In poetica adhibet terminοs, quοs in rhetorica valuisse scimus, velut τὸ συντόμως καὶ ἐναργῶς, πολυτελῶς, ἐμβριθῶς, μὴ εὐτελῶς (Jensen 302 sq.).


XXVII. Heraclides of Pontus

1. Diogenes Laertius 5.88 (on Heraclides' writings):  Rhetorical writings, On Public Speaking or On Protagoras.

In no way could I be persuaded by the arguments, or rather pure speculation, of Barwick (Herm. 57, 40 f.), according to which there was a techne rhetorike  by him that later authors ignored.


2. Antiphanes, Among the Carians: Don’t you see the eunuch dancing on his hands, and he is not ashamed, he who explains Heraclitus to all is the only one who discovered Theodectus’ art, and writes the main points of Euripides’ plays.

Trendelenburg in Meineke ibid. has tried to prove that these verses refer to Heraclides Ponticus. But ‘Theodectus’ techne' cannot be Aristotle's Theodectan rhetoric, see below s. v. Theodectes. Furthermore, since Euripides is named just afterward, it is likely that the reference is to Theodectes’ treatise on tragedy, which grew through Heraclides’ teachings. Finally, in the Index Philosophorum Academicorum Hercul. I found nothing that can be referred to Heraclides’ rhetoric.





3. Philodemus, On Poems: [Heraclides says that] from the point of view of pleasure, appropriateness and imagery, poems and speeches have everything in common.


According to Philodemus (ibid. col. VI 32) the same Heaclides taught that to persuade is the task of a ‘simple’ poet. In the study of poetry he applies termini we know were important in rhetoric, that is, ‘concisely and clearly, abundantly, gravely and not cheaply’ (Jensen 302 f.).