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

Black and white lantern slide of an excavated gravesite. The label on the slide reads, "Interm. Skeleton under slabs."

Black and white photograph of the Daisy Geyser in eruption, Yellowstone National Park. A man is seen walking next to the geyser.

Black and white close-up photograph of a dam. Taken my Merrill while attending the American Society of Civil Engineers conference in New Orleans, Louisiana.

Black and white photograph of a boy and a girl, David and Mary Burkhead, sitting on chairs on grass next to a house.

Black and white photograph of a boy and a girl, David and Mary Burkhead, sitting on chairs on grass next to a house.

Black and white photograph of a baby, David Burkhead, in a high chair.

Black and white photograph of a boy, David Burkhead, sitting on a chair on grass next to a house. His eyes are closed.

Black and white photograph of the gravestone of Deacon John Shute (range 4 row 8) which reads, "Here Lies Buried the Body of Deacon John Shuke who departed this Life Sep 30 1780 in y 88 Year of His Age."

Black and white photograph of four people standing in front of the arch in the Wawona tree at Yosemite. A sign above the arch reads, "Dead Giant."

Black and white lantern slide of an excavated burial site. The lantern is labeled "Deep skeleton, uppermost section."

Black and white lantern slide of a "deep fireplace" at the Uyak Bay site.