She was moving, and he put his arm under her head.

The stone under his head had not been there a second before.

Then he saw the pool of blood under her head.

There was a small pool of blood just beginning to form under her head.

I put me hand under his head to lift him up.

Molly was on the bed, one hand under her head.

There was no blood on the linen under his head.

She found the bundle that had been under her head.

As to what the brother and the old man are doing, that comes under a different head altogether.

He pulled a pillow up under his head and went to sleep.