ὅσον ἀπὸ τοῦ ἱεροῦ ἐφεωρᾶτο τῆς νήσου → as much of the island as was in view from the temple
ἕᾱδα: μετοχ. ἑᾱδώς, ἴδε ἁνδάνω.
v. ἁνδάνω.