Black and white print with high angle view of mules crossing South Kaibab Bridge.

Black and white print of people on South Kaibab Bridge.

Black and white, silver gelatin print with some silvering. Circa 1930.

Black and white, silver gelatin print with some silvering. Circa 1930.

Black and white, silver gelatin print with some silvering. Circa 1930.

Black and white, silver gelatin print with some silvering. Circa 1930.