They were dropped on the flooded plains and buried in the sands and gravels.
There have been many floods since then, and each time the river has dropped part of its load.
A spearhead
So the weapons have been buried very deep.
Sometimes people have dug deep down into the earth, and sometimes they have found the Cave-men’s weapons.
There are pictures of some of them in this book.
Can you see that they tell what the Cave-men did?
Bones, too, have helped to tell something of the Cave-men.