Description of Greece
Pausanias
Pausanias. Pausaniae Graeciae descriptio, Volumes 1-3. Spiro, Friedrich, editor. Leipzig: Teubner, 1903.
κατὰ δὲ τὴν ὁδὸν ἐς αὐτὴν τὴν πόλιν ἐστὶν Ἀθηνᾶς λίθου μὲν ἐπιχωρίου ναός, ἐλέφαντος δὲ τὸ ἄγαλμα καὶ χρυσοῦ· Φειδίαν δὲ εἶναι τὸν εἰργασμένον φασὶ πρότερον ἔτι ἢ ἐν τῇ ἀκροπόλει τε αὐτὸν τῇ Ἀθηναίων καὶ ἐν Πλαταιαῖς ποιῆσαι τῆς Ἀθηνᾶς τὰ ἀγάλματα. λέγουσι δὲ οἱ Πελληνεῖς καὶ ἄδυτον τῆς Ἀθηνᾶς καθήκειν ἐς βάθος τῆς γῆς, εἶναι δὲ τὸ ἄδυτον τοῦτο ὑπὸ τοῦ ἀγάλματος τῷ βάθρῳ, καὶ τὸν ἀέρα ἐκ τοῦ ἀδύτου νότιόν τε εἶναι καὶ διʼ αὐτὸ τῷ ἐλέφαντι ἐπιτήδειον.