In 1816, Lord Byron wrote a narrative poem that has become a classic. The poem is titled, "The Prisoner of Chillon," and it is the story of a man incarcerated in the dungeon at the Castle of Chillon near Lake Geneva, Switzerland.

The prisoner was in a narrow, cramped dungeon cell for such a long time that he began to think of it as home. He made friends with the spiders, insects, and mice that shared his cell. They were all inmates of the same dungeon and he was monarch of each race.

The years in the dark dungeon cell had taken their toll. He was no longer unhappy or uncomfortable. He had grown accustomed to his environment and came to think of his chains as friends.

One day a bird perched on the crevice of the ledge above and began to sing. It was the sweetest music he had ever heard. …