The 18^th century Tibetan Buddhist Dagpu Luvsan Dambiijaltsan was the reincarnation of the Indian Prince Dharmanand. [3] Somewhere between 1735 and 1737, at the request of his students, Dagpu Luvsan Dambiijaltsan wrote down the dreams and visions he had since he was 11 years old. The book was titled, “The Tale of the Moon Cuckoo with a Blue Voice.” Its aim was to help readers understand the significance of compassion. About a century later, Noyon Khutagt Danzaravjaa wrote an opera based on this story in Mongolian. It is a legend about why the song of the cuckoo bird ushers in the beginning of spring.