They have left its rude sketches on pieces of ivory and flakes of bone, and carvings, of the animals contemporary with them.

In these prehistoric delineations, sometimes not without spirit, we have mammoths, combats of reindeer.

One presents us with a man harpooning a fish, another a hunting-scene of naked men armed with the dart.

Man is the only animal who has the propensity of depicting external forms, and of availing himself of the use of fire.
Shell-mounds, consisting of bones and shells, some of which may be justly described as of vast extent, and of a date anterior to the Bronze age, and full of stone implements, bear in all their parts indications of the use of fire.

These are often adjacent to the existing coasts sometimes, however, they are far inland, in certain instances as far as fifty miles.