SUBTERRANEAN RELICS OF PREHISTORIC MAN.
The Peat Mosses of Denmark—Shell-Mounds—Swiss Lacustrine
Dwellings—Ancient Mounds in the Valley of the
Mississippi—The Caves in the Valley of the Meuse—Dr.
Schmerling—Human Skulls in the Cave of Engis—
Explorations of Sir Charles Lyell in the Cave of
Engihoul—Caverns of Brixham—Caves of Gower—The
Sepulchral Grotto of Aurignac—Flint Implements
discovered in the Valley of the Somme—Gray’s Inn Lane an
ancient Hunting-Ground for Mammoths 221