Hindoo Ring

The narrator in the story The Transition of Juan Romero wore a "quaint and ancient Hindoo Ring" with "hoary hieroglyphs" he had acquired on his travels through India.

"Of its nature, and manner of coming into my possession, I cannot speak. It was my last link with a chapter of life forever closed, and I valued it highly."

It was the ring attracted the attention of Juan Romero.

In the story, the ring was discovered as a light source as the narrator and Joan Romero followed a strange call:

"candle, I realised that the ancient ring on my finger was glowing with eerie radiance, diffusing a pallid lustre through the damp, heavy air around."

After the narrator losing consciousness, the ring vanished, supposedly it was taken by the transformed Juan Romero or an otherworldy entity.