William Taft actually said...
By virtue of the power vested in me by the provisions of Article 3 of the Treaty of August 21, 1847 (9 Stat. L., 908), it is hereby ordered that the country ceded by the provisions of said treaty shall no longer be held by the United States as Indian land.
Context
Executive Order 1299—Ordering Lands Ceded by Pillager Band of Chippewa Indians No Longer Held as Indian Land
02/15/1911