Black and white lantern slide of Tahquamanon Falls.

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

Black and white lantern slide of the Grand Canyon from Grand View Point.

Black and white lantern slide of the Grand Canyon's Upper Bright Angel Trail.

Black and white lantern slide of the Grand Canyon, taken from Yaki Point. A woman leans against a railing at the precipice.

Black and white lantern slide of the Grand Canyon, taken from Hopi Point.

Black and white lantern slide of the terraced landscape near Cedar Tree House at Mesa Verde National Park.

Black and white lantern slide of "Fat Man's Misery" section of the Square Tower House at Mesa Verde National Park.

Black and white lantern slide close up view of a wooden ladder at the Square Tower house at Mesa Verde National Park.

Black and white lantern slide close up view of a cliff dwelling in Mesa Verde National Park, looking north.

Black and white lantern slide close up view of a cliff dwelling in Mesa Verde National Park.

Black and white lantern slide of a cliff dwelling in Mesa Verde National Park, looking north.

Black and white lantern slide of the ruins of Pueblo Bonito in Chaco Canyon.

Black and white lantern slide of the Casa Grande Ruins National Monument.

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

Black and white lantern slide of the Roosevelt Dam.

Black and white lantern slide of a bridge over the Pecos River.

Black and white lantern slide of Robert Merrill standing on a petrified agate tree in the Petrified Forest National Park.

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

Black and white lantern slide of Robert Merrill standing next to a large Joshua Tree in the desert.

Black and white lantern slide of a giant tree, the "General Sherman" in Sequoia National Park.

Black and white lantern slide of a giant tree, the "General Grant" in Sequoia National Park.

Black and white lantern slide aerial view of Nevada and Vernal Falls in Yosemite National Park.

Black and white lantern slide copy of a genealogical chart of Robert Hall Merrill.