When wise Theodosius ruled his eyesight deteriorated. He therefore issued an edict: a bell would be installed in his palace and anyone who had a matter to bring before him would ring the bell with his own hand. When the bell rang the judge who was then appointed would come immediately and issue justice.
It happened that a snake built its nest underneath this bell and within a short time had babies. When these young vipers could slither, the snake made its way with its young to a spot outside the city. While the snake was away, a toad occupied its nest; when the snake returned with its young vipers, it saw how the toad had taken over the nest. It battled with the toad, but could not remove it on its own and so the toad took possession of its nest. When the snake realized this, it wrapped its tail around the bell’s rope, pulled it efficiently and rang the bell as if saying “Come down, you judge, and give me justice, for a toad has violated every law and taken possession of my nest.”
When the judge heard the bell ringing he came down but didn’t see anyone so he went upstairs again. When the snake noticed this, it rang a second time. When the judge heard this and saw the snake ringing the bell rope, and saw how the toad had occupied its domicile, he climbed the stairs to the palace and told the king everything. The king spoke: “Go down and don’t only drive the toad from the nest, but kill it also, because the snake must assume its rightful place once more.” And so it happened.
One day after this incident, the king was lying in bed; the snake came into his chamber and carried in its mouth a precious stone. And when the king’s servants saw this, they said to their master that a snake had come in. But Theodosius spoke: “Do not prevent it from entering, because I believe it won’t harm me.” The snake crept onto his bed and approached his face. And when it stared into his eyes, it dropped the stone and then retreated from the king’s chamber. When the stone touched both of his eyes, the king’s eyesight returned. He rejoiced and had his servants search for the snake. But they could not find it. The king kept the precious stone and lived in peace until his dying day.