Bureau of Civil Investigation's Extraordinary Records (Complete 8 Volumes).

Summary

The passage describes an encounter with a mysterious black-robed figure on a ghost ship. During a conversation about a legendary Dragon Heart Stone called Ryuugan, the characters fall through a decaying deck into a dark cabin. A black-robed figure holds a struggling treasure rat, claiming it stole something from him. The narrator cannot clearly see the figure's face and feels increasingly uncertain. When questioned about his humanity, the mysterious figure cryptically responds that he has forgotten whether he is human or ghost, and demands the return of something the rat has stolen.

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