Black and white lantern slide of a variety of cacti in the desert at Saguaro National Park.

Black and white lantern slide of cliff dwelling ruins at Tonto National Monument.

Black and white lantern slide of Indigenous dancers in regalia, taken at the Grand Canyon.

Black and white photograph of the falls from Artist's Point at Yellowstone National Park (mile 17601).

Black and white photograph of a river chasm.

Black and white photograph of a narrow river chasm.

Black and white photograph of three people, one man and two women, standing on a rock formation across from a rock formation set into a cliff face.

Black and white photograph of a man sitting in a boat on a river in a chasm.

Black and white photograph of three people, two women and a man, standing on tiered ledge of a cliff face on one side of a river chasm.

Black and white photograph of three people, two women and a man, standing in front of a rock cliff face. Trees are visible on top of the rock wall and next to the three people at ground level.

Black and white photograph of a river in front of a rock cliff face.

Black and white photograph of the face of a baby, David Burkhead, grandson of Robert Merrill's sister Ida Hewitt.