In a number of other places Aristotle speaks of a thinker, whom he does not happen to name, who held that the primary substance was something “intermediate between” the elements or between two of them.[108] Nearly all the Greek commentators referred this to Anaximander also, but most modern writers refuse to follow them. It is, no doubt, easy to show that Anaximander can have never meant to describe the Boundless in this way, but that is no real objection to the older interpretation. It is difficult to see that it is more of an anachronism to call the Boundless “intermediate between the elements” than to say that it is “distinct from the elements”; and indeed, if once we introduce the elements at all, the former description is in some ways the more adequate of the two. At any rate, if we refuse to understand these passages as referring to Anaximander, we shall have to say that Aristotle paid a great deal of attention to some early thinker, whose very name has been lost, and who not only agreed with some of Anaximander’s views, but also, as is shown by one passage, used some of his most characteristic expressions.[109] We may add that in one or two places Aristotle certainly seems to identify the “intermediate” with the something “distinct from” the elements.[110] Footnote 108: Aristotle speaks four times of something intermediate between Fire and Air (_Gen. Corr._ Β, 1. 328 b 35; _ib._ 5. 332 a 21; _Phys._ Α, 4. 187 a 14; _Met._ Α, 7. 988 a 30). In five places we have something intermediate between Water and Air (_Met._ Α, 7. 988 a 13; _Gen. Corr._ Β, 5. 332 a 21; _Phys._ Γ, 4. 203 a 18; _ib._ 5. 205 a 27; _de Caelo_, Γ, 5. 303 b 12). Once (_Phys._ Α, 6. 189 b 1) we hear of something between Water and Fire. This variation shows at once that he is not speaking historically. If any one ever held the doctrine of τὸ μεταξύ, he must have known perfectly well which two elements he meant. Footnote 109: Arist. _de Caelo_, Γ, 5. 303 b 12, ὕδατος μὲν λεπτότερον, ἀέρος πυκνότερον, ὃ περιέχειν φασὶ πάντας τοὺς οὐρανοὺς ἄπειρον ὄν. That this refers to Idaios of Himera, as suggested by Zeller (p. 258), seems very improbable. Aristotle nowhere mentions his name, and the tone of his reference to Hippon in _Met._ Α, 3. 984 a 3 (R. P. 219 a) shows that he was not likely to pay so much attention to the ἐπίγονοι of the Milesian school. Footnote 110: Cf. _Phys._ Γ, 5. 204 b 22 (R. P. 16 b), where Zeller rightly refers τὸ παρὰ τὰ στοιχεῖα to Anaximander. Now, at the end (205 a 25) the whole passage is summarised thus: καὶ διὰ τοῦτ’ οὐθεὶς τὸ ἓν καὶ ἄπειρον πῦρ ἐποίησεν οὐδὲ γῆν τῶν φυσιολόγων, ἀλλ’ ἢ ὕδωρ ἢ ἀέρα ἢ τὸ μέσον αὐτῶν. In _Gen. Corr._ Β, 1. 328 b 35 we have first τι μεταξὺ τούτων σῶμά τε ὂν καὶ χωριστόν, and a little further on (329 a 9) μίαν ὕλην παρὰ τὰ εἰρημένα. In Β, 5. 332 a 20 we have οὐ μὴν οὐδ’ ἄλλο τί γε παρὰ ταῦτα, οἶον μέσον τι ἀέρος καὶ ὕδατος ἢ ἀέρος καὶ πυρός.