Black and white photograph of a bear by the Fountain Hotel, Yellowstone National Park.The ground around the bear appears to be scattered with discarded metal cans.

Black and white photograph of bears at the back of the Old Faithful Inn, Yellowstone National Park.

Black and white photograph of the Beehive Geyser before eruption, Yellowstone National Park. A man and a woman are standing near the geyser.

Black and white photograph of the Beehive Geyser in eruption, Yellowstone National Park. Lena Billington Merrill can be seen at a short distance from the geyser.

Black and white photograph of the Beehive Geyser, Yellowstone National Park, with Lena Billington Merrill facing the camera.

Black and white photograph showing a close view of a black bear cub, facing away from the camera. Taken by Robert Merrill at the Lake Colonial Hotel, Yellowstone National Park.

Black and white photograph showing a close view of a black bear cub, facing the camera. Taken by Robert Merrill at the Lake Colonial Hotel, Yellowstone National Park.

Black and white photograph of the Grand Canyon of the Yellowstone River. Taken by Robert Merrill from Grand View.

Black and white photograph in portrait orientation of the Grand Canyon of the Yellowstone River, Yellowstone National Park. Taken by Robert Merrill looking north.

Black and white photograph of a horse-drawn coach at the Mammoth Hotel, Yellowstone National Park. Several people can be seen in and around the coach. Lettering on the side of the coach reads Yellowstone Park Transportation Co. Water damage is…

Black and white photograph of a horse-drawn coach in the Hoodoos, Yellowstone National Park. Five people are visible sitting on the coach.

Black and white photograph of the Constant Geyser at Yellowstone National Park. Several people can be seen on the left side of the image observing the geyser erupt.