Black and white photograph of Robert H. Merrill standing between a stone wall and columns in the Triangular Forum at Pompeii.

Black and white photograph of Robert H. Merrill standing in the House of Pansa between two walls with columns in the background. A sign on the right side of the frame reads "DOMVS CN ALLEI NIGIDI MAI."

Black and white photograph of the brick wall of the central baths at Pompeii.

Black and white photograph of partially buried skeletons in Pompeii, Italy.

Black and white photograph stone table legs carved with lion motifs in Pompeii, Italy.

Black and white photograph looking south from a tower over Via di Mercurio, Pompeii, Italy.

Black and white photograph of Seiano, Italy, taken from the north.

Black and white photograph of Seiano and the coast from Vico.

Black and white photograph of two men and two women sitting on the rock formation Norman's Woe looking out to sea in Glouchester, Massachusetts.

Black and white photograph of three women and two men, including Robert H. Merrill, standing behind a gravestone that reads "In Memory of Nathaniel Merrill Died 1655." The gravestone in the foreground of the image reads "In Memory of Stephen Swett B.…

Black and white photograph of two women, May and Flora, sitting on a short stone wall with trees in the background at Brooklyn Botanical Gardens.

Black and white photograph of one man and two women on a hill with Washington D.C. in the background.

Black and white photograph of Algonquin Beach, taken from 1 mile south in Keppel, Ontario.

Black and white photograph (slightly overexposed) of three people walking on a dock along a river at Witches' Gulch, Wisconsin Dells. A tour boat is moored at the dock in the bottom left of the frame, and two people are visible in the boat.

Black and white photograph (slightly overexposed) of a man and a woman standing next to the Demon's Anvil stone formation at Wisconsin Dells. A lake is visible in the background.

Black and white photograph (over exposed) of three people standing near a parked automobile in the Bad Lands (mile 16738) .

Black and white photograph of a man and a woman sitting on a hill in front of Mount Rushmore (mile 16853).

Black and white photograph of the Black Hills Needles. Five automobiles are visible in the foreground, and several people can be seen walking next to the Needles (mile 16894).

Black and white photograph of a group of people looking out at the Shoshone Dam (mile 17328).

Black and white photograph of a group of people standing next to the Mud Volcano at Yellowstone National Park (mile 17450).

Black and white photograph of a group of people standing next to the Dragon's Mouth at Yellowstone National Park (mile 17450).

Black and white photograph of six people standing next to the Upper Falls at Yellowstone National Park (mile 17459).

Black and white photograph of the gorge below the lower falls at Yellowstone National Park.

Black and white photograph of a river and mountains from Inspiration Point (mile 17502).