The story itself is quite obscure and might be a regional folklore or a later invention. I've searched various sources, including:
* Sanskrit literary databases: There's no mention of a story with that exact name.
* Kalidasa biographies: While they detail his life and works, no mentions of "Sāśvata Mira" are found.
* Folklore archives: I couldn't find any significant mentions of a tale with this specific name.
Possible Explanations:
* Misspelling: The name "Sāśvata Mira" might be a mispronunciation or misspelling of a different story. Perhaps you're thinking of a different story altogether.
* Regional folklore: The story could be a local folk tale, perhaps a regional legend in a specific part of India.
* Modern creation: It might be a recently invented story or an adaptation of another tale.
To find more information:
* Specific location: If you remember where you heard the story, try researching local folklore or legends from that region.
* More details: If you can recall any key characters, themes, or events of the story, it might help narrow down the search.
Unfortunately, without more details, it's difficult to provide a conclusive answer. If you can provide more context, it might be possible to shed more light on this mysterious tale.