The Library of Congress provides access to Senate Bill 555 (35th Congress 2nd Session), a bill "to provide temporary governments for the Territories of Dacota [sic] and Arizona, and to create the office of surveyor general for the Territory of Arizona." February 4, 1859, a bill was introduced in the Senate (S-555), for the admission of Dakota, in which bill Arizona was included. Nothing came of it.

• April 2-5, 1860, a Constitutional Convention was held at Tucson. Thirty-one delegates were present. The Constitution ordained and established a provisional government to remain in force until Congress should organize a Territorial Government. This Territory included all of New Mexico south of latitude 33 degrees, 40 minutes, and was subdivided into four counties. James A. Lucas was president, G. H. Oury and T. M. Turner secretaries of the convention. Dr. L. S. Owings of Mesilla was elected Governor. In November Edward McGowan was elected delegate to Congress to succeed Mowry.