ἅ: refers to ἐρωτηθεὶς ἀποκρίνασθαι κτἑ.
σμικροὐ κτἑ.: cf. Euthyphro 13 a ἀλλὰ σμικροῦ τινος ἔτι ἐνδεής εἰμι. The inf. πάντ᾽ ἔχειν depends upon ἐνδεής εἰμι, cf. Crat. 432 d ἢ οὐκ αἰσθάνει ὅσου ἐνδέουσιν αἱ εἰκόνες (how far the images fall short) ταὐτὰ ἔχειν ἐκείνοις ὧν εἰκόνες εἰσίν; Lys. 204 e πολλοῦ δεῖς τὸ εἶδος ἀγνοεῖν τοῦ παιδός. Since, however, here the sense is that of πάντ᾽ ἂν ἔχοιμι, the corresponding cond. form εἴ μοι ἀποκρίναιο τόδε follows.
φῄς: implies assertion, not argument; asdoes thefollowing πειθοίμηνἄν.
εἴ περ ἄλλῳ τῳ cf. 352 c, Phaedo 67 b ἐκεῖ ἱκανῶς, εἴπερ που ἄλλοθι (i.e. if anywhere), κτήσασθαι τοῦτο, 63 c εὖ ἴστε, ὅτι, εἴπερ τι ἄλλο τῶν τοιούτων, δυσχυρισαίμην (affirm confidently) ἂν καὶ τοῦτο. So almost always. Very rarely has εἴπερ a verb of its own, as Meno 98 b ἀλλ᾽ εἴπερ τι ἄλλο φαίην ἂν εἰδέναι, ὀλίγα δ̓ ἂν φαίην, ἓν δ̓ οὖν καὶ τοῦτο ἐκείνων θείην ἂν ὧν οἶδα (this, at any rate, I would put down as one of the things that I know).