Black and white photograph of Lena Billington Merrill, seat on Pikes Peak.

Black and white photograph of Lena Billington Merrill aboard the Pikes Peak Cog Railway. Taken by Robert Merrill from the ground.

Black and white photograph of a tower on Pikes Peak. Several people can be seen standing next to railroad tracks in the foreground.

Black and white photograph, taken by Robert Merrill, looking southwest toward Cripple Creek, Colorado.

Black and white photograph, taken by Robert Merrill, looking southeast toward lakes. Likely taken near Pikes Peak, Colorado.

Black and white photograph showing view of Pikes Peak, Colorado below timber line.

Black and white photograph of several people at the top of Jupiter Terrace at Yellowstone National Park.

Black and white photograph of a group of seventeen people at Angel's Rest, Yellowstone National Park.

Black and white photograph of terraces from Point Lookout, Yellowstone National Park. A large group of people can be seen standing along one area.

Black and white photograph of terraces at Yellowstone National Park. Taken by Robert Merrill, looking southeast from hill.

Black and white photograph of terraces at Yellowstone National Park. Taken by Robert Merrill, looking south from hill.

Black and white photograph of Jupiter Terrace at Yellowstone National Park. Taken by Robert Merrill from below.