Congress investigated their claim and ultimately concluded that English law at the time prohibited any land grants to individuals. They also concluded that Carver himself never made any mention of such a grant in his book or afterwards, and finally that no Indians in the region had any knowledge of such a transaction having been made by their grandparents' generation; in 1817, Sioux elders in St. Paul had even told Carver's heirs that no chiefs with the names on the deed had ever existed. Congress concluded, on Jan. 29, 1823, not to permit Carver's heirs the rights to this land in Wisconsin. Land speculators and con-men nevertheless continued to promote the sale of portions of "Carver's Grant" for another half century.