Orson F. Whitney recounts reading in notes by Oliver B. Huntington that Joseph taught the earth was inhabited three times before Adam.
Orson F. Whitney, Journal, July 22, 1906, Utah State University Special Collections
Between meetings I had an interesting conversation with Patriarch Oliver B. Huntington. He showed me a little book in which he had recorded things said to him by the Prophet Joseph Smith. One was that the earth had been inhabited 3 times before Adam came upon it; the former races having been destroyed.