flint

Sometimes he weeps bitterly, sometimes laughs boisterously, at other time he passes hours on the seashore, flinging stones in the water and when the flint makes ‘duck-and-drake’ five or six times, he appears as delighted as if he had gained another Marengo or Austerlitz.

There was a cabinet of flint instruments.

"It is quite superficial." His face set like flint as he glared at our prisoner, who was sitting up with a dazed face.

As you look at their grey stone huts against the scarred hillsides you leave your own age behind you, and if you were to see a skin-clad, hairy man crawl out from the low door fitting a flint-tipped arrow on to the string of his bow, you would feel that his presence there was more natural than your own.