εἰ...μὴ προσεμαρτύρουν ‘Had they not deposed to the will, as well as to the challenge, I might reasonably have declined to open the document (purporting to be a copy of the will): but, as they actually deposed to both, and as the jury would have to hear the will whether I opened it or not, what was the use then of my refusing to open it?’
κἂν εἰ The ἂν strictly belongs to the apodosis ἐμὸν ἦν, but is here, as often, put as early as possible. Cf. Or. 36 § 42, οἶμαι...κἂν εἰ. .λἑγοι, κάλλι<*>ον εἶναι, 19 § 282; 21 § 51; 24 § 109. Sometimes the construction of the apodosis shows that κἂν εἰ is regarded as much the same as καὶ εἰ, e.g. Plato Meno 72 C κἂν εἰ πολλαὶ καὶ παντοδαπαί εἰσιν, ἔν γέ τι εἶδος ταὐτὸν ἄπασαι ἔχουσι. Kühner, Gk Gr. § 398, p. 210. Buttmann calls this ‘ἂν consopitum,’ where its force is, as it were, dormant. It is peculiar to the later or middle Attic.