51.   The hotel walls were so thin was able to hear a watch ticking away in the next room.

52.   The walls are slightly out of true.

53.   The interior walls are all painted white.

54.   Keep your voice down - the walls are paper thin.

55.   The rough rock walls were like the sides of a deep canal.

56.   The walls are light in colour and covered in paper.

57.   The walls have been painted bright yellow.

58.   How thick are these walls?

59.   The exterior walls are three to three and a half feet thick to prevent penetration by bombs.

60.   The stone wall is from a bygone age.