I believe that when Prince Ivan fell senseless, he saw, or fancied he saw, that nameless being.

And now," I added, loosening my clasp of her, "have I guessed well ?" Zara looked meditative.
"I do not know," she said, "why you should imagine--" "Stop!" I exclaimed; "there is no imagination in the case.

I have reasoned it out.

Here is a book I found in the library on electric organs as they are discovered to exist in certain fish.

Listen: 'They are nervous apparatuses which in the arrangement of their parts may be compared to a Voltaic pile.