Strabo Geography 1.2.40

[40] Starting from these premises, the poet, in conformity both with general custom and his own practice, narrates some circumstances as they actually occurred, and paints others in the colours of fiction. He follows history when he tells us of Aeetes and Jason also, when he talks of Argo, and on the authority of [the actual city of Aea], feigns his city of Aeaea, when he settles Euneos in Lemnos, and makes that island friendly to Achilles, and when, in imitation of Medea, he makes the sorceress Circe

Sister by birth of the all-wise Aeetes, ¹

Odyssey x. 137. he adds the fiction of the entrance of the Argonauts into the exterior ocean as the sequel to their wanderings on their return home. Here, supposing the previous statements admitted, the truth of the phrase the renowned Argo, ² is evident, since, in that case, the expedition was directed to a populous and well-known country. But if, as [Demetrius] of Skepsis asserts, on the authority of Mimnermus, Aeetes dwelt by the Ocean, and Jason was sent thither far east by Pelias, to bring back the fleece, it neither seems probable that such an expedition would have been undertaken into unknown and obscure countries after the Fleece, nor could a voyage to lands desert, uninhabited, and so far remote from us, be considered either glorious or renowned.

[Here follow the words of Demetrius.] And again: