Letter from Jesse L. Boyce to Jack in which he refers to W. W. Crosby as a "damn carpetbagger" and his frustration at Crosby making him out to be a "liar."

Letter from Jesse L. Boyce to Carl Hayden stating there is 30 tons of dynamite located in the Grand Canyon near tourist sites.

Letter to Jesse L. Boyce from unknown author (possibly Jack) about the investigation into the powder magazine located in the Grand Canyon. Some personal news is included in the letter such as the writer's marriage to the daughter of C.A. Taylor, former Supervisor of Cochise County.

Letter from the Director of the National Park Service, Stephen T. Mather, to Jesse L. Boyce informing him that immediate action is being taken to remove the TNT from the Grand Canyon.

Letter from Jesse L. Boyce to Carl Hayden stating that the Director of the National Park Service will order Colonel Crosby to remove the dynamite from the park.

Letter from Jesse L. Boyce to Jack regarding the storage of dynamite in Shoski Canyon.

Letter from Stephen Mather to Carl T. Hayden regarding automobile regulations within Grand Canyon National Park.

Letter from Stephen T. Mather to Carl T. Hayden advocating for a reduction in automobile fees for the South Rim entrance.

Letter from Stephen T. Mather to Carl T. Hayden regarding a negative newspaper article about the National Park Service and Stephen Mather.

Letter from Stephen T. Mather to Carl T. Hayden thanking Hayden for his advice about visiting Arizona.