The lonely boy

Today I'm going to explain a story which I listened from my great-grandfather when he was alive.
A long time ago, in Riumors, there was a child who didn't have friends.
One day a group of friends decided to play a joke on him. They caught him and then closed him in a sack, then they brought him to the belfry of the church, the boy shouted and cried a lot, and the group of friends tied the boy with chains in an old chamber of the belfry.
The boy stayed there all night, and when the group returned in the morning, the lonely boy had disappeared, they only found a finger tied in the chains.
Some people from the village, looked for the boy for weeks, they only found the finger tied in the chains.
The last person who lived this horrible facts is already dead.
Nowadays old people tell to anyone who wants to listen to them, the story of the lonely boy, and that when there's strong Tramuntana, you can still hear the screams of the boy of the belfry.