The monster offered no resistance and died there.

As any good geneticist will tell you, most monsters die at birth.

The monsters themselves grew old and lay down and died.

Where the monster had died, only the bare floor met his eyes.

Behind him he heard a moaning cry as though some monster was dying.

In any one of these places the monster might pause a while, play, cause Harry to laugh, cry, scream - or die.

For on the floor where the monster had died, there lay, like a tangible shadow, a broad dark stain that could not be washed out.

Once the monster has died, the men can safely return home and reconstruct their hut.

Probably the monster had died of old age.

The monster doesn't die in the film, but gets the girl and lives happily afterward.