ὅσον ἀπὸ τοῦ ἱεροῦ ἐφεωρᾶτο τῆς νήσου → as much of the island as was in view from the temple
opt. pf.2 de *εἴδω.
εἰδείην: εἰδέναι, ἴδε τὸ ῥῆμα εἴδω Β.
εἰδείην: ευκτ. του οἶδα, απαρ. εἰδέναι, βλ. *εἴδω Β.
εἰδείην: pf. opt. к *εἴδω.