It looks like the first quote is something Deepak Chopra said about Campbell for the film Mythic Journeys — he may have been paraphrasing.
Youtube video:
And Campbell has said “mythology is not history” in a few places, for example, in the book The Ecstasy of Being: Mythology and Dance/Page 22. “Now, mythology is not history (the rehearsal of literal fact), but vision (a pictorial symbolization of the backgrounds of existence).”
Also, in the book The Power of Myth/Page 163 Campbell says: “It has been well said that mythology is the penultimate truth — penultimate because the ultimate cannot be put into words.”