 They left Texas and moved back to Indian Territory in 1900 to be close to his Apache and Comanche friends.On August 26, 1901, Quanah Parker provided a legal affidavit verifying Lehman's life as his adopted son 1877–1878.On May 29, 1908, the United States Congress authorized the United States Secretary of the Interior to allot Lehmann, as an adopted member of the Comanche nation, one hundred and sixty acres of Oklahoma land.