After inquiries made in England, France, Russia, Prussia, Spain, Italy, and America, even in Turkey, the hypothesis of a submarine monitor was definitely rejected. Upon my arrival in New York several persons did me the honour of consulting me on the phenomenon in question. I had published in France a work in quarto, in two volumes, entitled “Mysteries of the Great Submarine Grounds.” This book, highly approved of in the learned world, gained for me a special reputation in this rather obscure branch of Natural History. My advice was asked. As long as I could deny the reality of the fact, I confined myself to a decided negative. But soon, finding myself driven into a corner, I was obliged to explain myself categorically. And even “the Honourable Pierre Aronnax, Professor in the Museum of Paris,” was called upon by the New York Herald to express a definite opinion of some sort. I did something. I spoke, for want of power to hold my tongue. I discussed the question in all its forms, politically and scientifically; and I give here an extract from a carefully-studied article which I published in the number of the 30th of April. It ran as follows:— “After examining one by one the different hypotheses, rejecting all other suggestions, it becomes necessary to admit the existence of a marine animal of enormous power. “The great depths of the ocean are entirely unknown to us. Soundings cannot reach them.