Black and white close-up photograph of the outer side of a mammoth tooth.

Black and white close-up photograph of the inner side of a mammoth tooth.

Black and white photograph of a man, Tony, holding a mammoth tooth in front of a house.

Black and white photograph of Lamont artifacts including part of a skull.

Group of ten men with shovels

Group of ten men with shovels

Black and white photograph of people working in a ditch in a street lined with houses.

Black and white photograph looking down a street lined with tall buildings. Automobiles are parked along the street, and people are visible walking.

Black and white photograph looking down a street lined with tall buildings. Automobiles are parked along the street, and people are visible walking.

Black and white photograph of two men, Dr. Frank Leverett and [?] Taylor. A person's shoulder is visible in the bottom left corner of the frame.

Black and white photograph of a group of people standing next to a line of automobiles parked along a road. Two men are standing at the top of a bioherm, an ancient moundlike reef mad of marine invertabrates, next to the road.

Black and white photograph of a group of people standing next to railroad tracks that are placed in a ravine.