Black and white lantern slide of old lava flows on Purple Mountain in Colorado.

Black and white photograph of Golden, Colorado from above.

Black and white photograph of five people, three men and two women, standing on Point Lookout.

Black and white photograph of a creek going downhill through a canyon.

Black and white photograph of a group of three men at the Manitou Cliff Dwellings. Several petroglyphs can be seen to the left of the group.

Black and white photograph of a woman standing in a rocky gorge.

Black and white photograph of a man working in front of a cave opening on a hillside.

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

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

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

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