11.   The specials look like prisons - high walls, barbed wire, electronic doors and large bunches of keys.

12.   The streets ran in a regular criss-cross pattern sloping up from the Railway Works which lay behind a high camouflaged wall.

13.   Then, to their surprise, they found before them a high wall which seemed to be made of white china.

14.   There were high walls on all four sides of the prison yard.

15.   There were high walls, old plush chairs, a heavy rug with a stale odor hanging close.

16.   The man unlocked a gate set in a high wall and let me through.

17.   ...a house, with a high wall all around it.

18.   The old Dutch fort with its thick high walls looks virtually impregnable.