"I'm a hollow oak," my father had said in his old age.
Mink is arrested trying to recover the money from Houston's body, which he had placed in a hollow oak.
Angling swiftly down the hill, he headed for the huge hollow oak.
The old hedgehog lived in a hollow oak, long dead but still standing, with a small door over a hole at its base.
Without a word, Anaya went inside the hollow oak.
Had the bees built their hives in the hollow oak yet?
"Yeah, it's got to be that big old hollow oak."
Frank drove near to the hollow oak, then pulled to the side of the road.
Let's look about for this hollow oak to beat, then we can start shouting.
Here, do you want me to butt him right over the top of that hollow oak?