Many traditional Lenape believe they have lived in their homeland (that is, in the New Jersey, Pennsylvania, and New York area) forever. The Delaware Tribe of Indians, located in eastern Oklahoma, originally endorsed the document but withdrew their endorsement on February 11, 1997 after reviewing the evidence. The Lenape Nation of Pennsylvania emphasize their belief that they have been in the area for 10,000 years. Whilst concluding that the burden of proof lies on those who believe the "Walam Olum" to be authentic, Barnhart states that "whatever one's position on the 'Walam Olum', its controversial place in the history of American anthropology is most definitively secured."