Originally a Sonoran adobe row house built about 1877 for John D. Walker, friend, agent, and physician to the Pima Indians at Sacaton, this building served as a courtroom and county offices during his terms as justice of the peace, county surveyor, and probate judge. Walker was an early investor in the Vekol Mine and wrote the first Pima grammar text. Here Pauline Cushman, a noted Union Civil War spy and actress, married Jere Freyer. In 1886 the building was purchased by Granville Oury, delegate to the Confederate Congress, Arizona territorial legislator and attorney general, district court judge, and delegate to the U.S. Congress.