Twentieth-century archaeology has confirmed that by Rafinesque's time, Native Americans had been using birch bark scrolls for over 200 years. In 1965 the archaeologist Kenneth Kidd reported on two finds of "trimmed and fashioned pieces of birch bark on which have been scratched figures of animals, birds, men, mythological creatures, and esoteric symbols" in the Head-of-the-Lakes region of Ontario. Some of these resembled scrolls used by the Mide Society of the Ojibwa. A scroll from one of these finds was later dated to about 1560 +/-70 CE.