Black and white lantern slide of three women sitting at a picnic in the woods near Croton Lake, Michigan.

Black and white lantern slide copy of a map of Indian trails in west Michigan counties Ottawa, Kent, Muskegon, Newaygo, and Oceana.

Black and white lantern slide of farmer John Jonio standing next to a wheelbarrow beside an excavation pit on his farm.

Black and white lantern slide of farmer John Jonio holding two mastodon bones found at his farm.

Black and white lantern slide of a sketch of cross sections of the Jonio Farm site excavation.

Black and white lantern slide of Robert Merrill and Audie Merrill standing next to a water pump at the Jonio farm.

Black and white lantern slide of the Jonio Farm mastodon excavation site.

Black and white lantern slide of the mastodon excavation at the Jonio Farm, a charcoal mass located at point 102.

Black and white lantern slide close up view of a charcoal mass located in the mastodon excavation site at the Jonio Farm.

Black and white lantern slide close up view of a charcoal mass located in the mastodon excavation site at the Jonio Farm.

Black and white lantern slide of the mastodon excavation at the Jonio Farm, with labeled charcoal masses found in the pit.

Black and white lantern slide of a mastodon femur and measuring stick in an excavated pit at the Jonio Farm site.

Black and white lantern slide copy of a tabulation sheet of the measurements of findings at the Jonio Farm mastodon excavation site.

Black and white lantern slide of the Jonio Farm mastodon excavation site.

Black and white lantern slide of a mastodon bone and measuring grid in an excavated pit at the Jonio Farm site.

Black and white lantern slide of a mastodon bone and measuring grid in an excavated pit at the Jonio Farm site.

Black and white lantern slide of a sketch map showing mastodon bone locations at the Jonio Farm site.

Black and white lantern slide of two men making plaster casts of bones found at the Jonio exavation site.

Black and white lantern slide of fourmen making plaster casts of bones found at the Jonio excavation site.

Black and white lantern slide of mastodon bones and measuring stick in an excavated pit at the Jonio Farm.

Black and white lantern slide of a truck mired in a field at the Jonio Farm.

Black and white lantern slide of several men digging in a marked excavation site on the Jonio Farm.

Black and white lantern slide copy of sketch drawings of outlines of ancient garden beds from an unknown source.

Black and white lantern slide copy of a sketch drawing of an ancient mine in Ontonagon County from an unknown source.