Evaluates the conservation significance of county-owned properties in Avra Valley, specifically with regard to Priority Vulnerable Species and the Sonoran Desert Conservation Plan.

Letter from A. E. Demaray to Carl Hayden regarding the sale of Bass properties to the Santa Fe Railroad Company.

Letter from Carl Hayden to J. R. Eakin regarding the sale of Bass property to the Santa Fe Railroad Company.

Letter from J. R. Eakin to Carl Hayden regarding the sale of Bass properties to the Santa Fe Railroad Company.

Letter from Carl Hayden to Stephen Mather regarding the sale of Bass properties to the Santa Fe Railroad Company.

Letter from W. W. Bass to Carl Hayden regarding the sale of Bass properties to the Santa Fe Railroad Company.

Letter from Stephen Mather to Carl Hayden regarding the sale of Bass properties to the Santa Fe Railroad Company.

Letter from Mrs. B. F. Gavin to Stephen Mather regarding the sale of Bass properties to the Santa Fe Railroad Company.

Letter from Stephen Mather, National Park Service to Carl Hayden on payment to W. W. Bass.

Letter from Carl Hayden to W. W. Bass congratulating him on his good business judgement.