Black and white lantern slide of a rock formation with petroglyphs in Parral, Mexico.

Black and white photograph of Parry Sound, Ontario. There appears to be a lumber yard in the foreground.

Black and white photograph of a group portrait of attendees of the American Society of Civil Engineers conference in Pasadena, Californa. The group stands in front of a building with striped awnings, with two men in front holding a banner that reads…

Black and white photograph of a baby, Paul R. Weston, being held in a woman's lap.

Black and white lantern slide of Paleolithic cave paintings of dappled horses and hand prints from Pech Merle cavern.

Black and white photograph of a crowd of people on the platform of a train station, likely taken in either Pedro Miquel, Panama or in Cuba. "Pedro Miguel Station." is written on the bottom of the image.

Black and white photograph of Pegli Beach. People are seen walking along on a boardwalk on the left of the frame, and buildings and mountains are visible in the background.

Black and white photograph of a town in the distance with several cottages between the town and the photographer. A pile of stones is stacked near one of the cottages in the foreground. Photograph was taken by Robert Merrill in the Chinese coastal…

Black and white photograph of the Chinese coastal resort area of Beidaihe Qu. The images shows cottages scattered across a countryside in front of a mountain.

Black and white lantern slide of the grounds of the American Embassy in Peking (Beijing), China. In the image, a neat lawn with a circular pathway is flanked by two lines of hanging paper lanterns leading to a group of chairs set up as for an event.…

Black and white lantern slide of a two story house in Peking (Beijing), China. In front of the house hangs a line of paper lanterns.

Black and white lantern slide of Robert (right) and Lena Merrill (left) sitting with Harry Paine in wicker chairs at a table in the courtyard of Paine's house in Peking (Beijing), China.

Black and white lantern slide of a polo match played by American marines in Peking (Beijing), China.

Black and white photograph of the town of Penetanguishene in Ontario, Canada, Several buildings are visible along a waterfront.

Black and white photograph of a truck parked on a dirt road on the side of a mountain. Two people are leaning against the stone wall, looking out at the countryside below. A crew of seven men are clearing a rockslide covering part of the road.

Pensacola Beach, Florida. The image was taken from the pier.

Black and white lantern slide of six men and two women standing under a tent

Black and white photograph of shoreline at Petoskey, Michigan,

Black and white photograph of shoreline at Petoskey, Michigan,

Black and white photograph of a woman and a boy in front of the Petrified Tree at Yellowstone National Park (mile 17527).

Black and white lantern slide of petroglyphs found north of Zape, Mexico.

Black and white photograph of Phoenix cottage in Macatawa, Michigan, taken from the water.

Black and white photograph of a small wooden raft floating next to the shore of a lake. "Pickerel Lake - Bitely" is written on the bottom of the image.

Black and white photograph of the 10-A Team at a picnic in Manitou Beach.