The following story about the horror of slavery in Sudan is originally from The Voice Of The Martyrs:
The brass shackle is called, in Arabic, a "bacle". Peter held it out as if it were a sacred object. It was a reminder of his family's past and of Peter's great blessing.
His grandfather had made the bacle, but it was not a craft project. In fact, he was forced to wear it by his Islamic masters. Peter's grandfather, though harassed and tormented by his Mulsim masters, would not join their faith. He held fast to his faith in Christ, and his body bore the scars of his refusal. Because he was not a Muslim, he was seen as nothing more than an animal.
Shortly before he died, Peter's grandfather had the bacle removed and gave it to Peter's father. "Our family will not always be slaves," he said, "but we must never forget."
Later Peter's father gave it to him, and he carried it with him when he escaped from his Muslim owner and fled to freedom. Today it is no longer a sign of ownership, but a sign of God's overcoming power. It is a symbol of God's hand on a family, working through three generations to bring them to freedom.
"Never forget my people," he urged. "Never stop praying for persecuted Christians in Sudan."