The Library of Congress provides access to Senate Bill S. 8 (35th Congress 1st Session) "to organize the territory of Arizona, and to create the office of Surveyor General therein, to provide for the examination of private land claims, to grant donations to actual settlers, to survey the public and private lands, and for other purposes," introduced on leave in Senate by Hon. William M. Gwin [of California], and referred to Committee on Territories, Dec. 17, 1857. The proposed Territory included the Gadsden Purchase and Dona Anna [sic] county, New Mexico, thus extending from the Colorado river to the border of Texas. The committee was discharged from further consideration of the bill, Feb. 8, 1859. See: "Memoir of the Proposed Territory of Arizona by Sylvester Mowry, U. S. A., Delegate Elect" (Avalon Project at Yale Law School).