Handwritten cover titled, "Nature Notes of Grand Canyon, Polyphemus Moth, Female, Found at Grand Canyon, 5 July 1928, Vol. 3 - No. 2." Cover includes a drawing of the moth.

Typescript report, black and white, describing the birds of Grand Canyon National Park with cover drawing of a bald eagle.

Black and white, mounted print with handwritten annotation, "1 Pres Butler of Columbia Col; 2 Paul Morton Vice P. of Santa Fe; 3 Pres Roosevelt; 4 Gov Brodie; 5 Mrs Lemke; 6 Mrs Smith." Very likely No. 4 from this series.

Black and white, wide angle, mounted print with handwritten annotation, "6 Pres. Roosevelt, Gov. Brodie, Miss Connel, Capt. Phillips."

Black and white print of people riding mules down a trail. Circa 1940-1949.

Press release on the increase in wildlife in the Grand Canyon including mountain sheep, deer, and the Abert Squirrel.

Letter from J. E. Gavin to Louis C. Cramton regarding the Bright Angel Trail controversy, including newspaper clipping.