They are of the kind that goes with an immensely powerful jaw, needing a massive brow-ridge to counteract the strain of the bite, and in general involving the type of skull known as the Neanderthal, big-brained enough in its way, but uncommonly ape-like all the same.
Finally, the banqueters have left plenty of their knives lying about.
These good folk had their special and regular way of striking off a broad flat flake from the flint core; the cores are lying about, too, and with luck you can restore some of the flakes to their original position.

Then, leaving one side of the flake untouched, they trimmed the surface of the remaining face, and, as the edges grew blunt with use, kept touching them up with the hammer-stone--there it is also lying by the hearth--until, perhaps, the flake loses its oval shape and becomes a pointed triangle.

A third expert is called in, and has no difficulty in recognizing these knives as the characteristic handiwork of the epoch known as the Mousterian.

If one of these worked flints from Jersey was placed side by side with another from the cave of Le Moustier, near the right bank of the Vezere in south-central France, whence the term Mousterian, you could hardly tell which was which; whilst you would still see the same family likeness if you compared the Jersey specimens with some from Amiens, or from Northfleet on the Thames, or from Icklingham in Suffolk.
Putting all these kinds of evidence together, then, we get a notion, doubtless rather meagre, but as far as it goes well-grounded, of a hunter of the ice-age, who was able to get the better of a woolly rhinoceros, could cook a lusty steak off him, had a sharp knife to carve it, and the teeth to chew it, and generally knew how, under the very chilly circumstances, both to make himself comfortable and to keep his race going.
There is one other class of evidence on which the pre-historian may with due caution draw, though the risks are certain and the profits uncertain.

The ruder peoples of to-day are living a life that in its broad features cannot be wholly unlike the life of the men of long ago.