Edgar Allan Poe: The Murders in the Rue Morgue

0. The Murders in the Rue Morgue (continued)

"I wish you to bear especially in mind that I have spoken of a very unusual degree of activity as requisite to success in so hazardous and so difficult a feat. It is my design to show you, first, that the thing might possibly have been accomplished: - but, secondly and chiefly, I wish to impress upon your understanding the very extraordinary - the almost pręternatural character of that agility which could have accomplished it.

"You will say, no doubt, using the language of the law, that 'to make out my case,' I should rather undervalue, than insist upon a full estimation of the activity required in this matter. This may be the practice in law, but it is not the usage of reason. My ultimate object is only the truth. My immediate purpose is to lead you to place in juxta-position, that very unusual activity of which I have just spoken with that very peculiar shrill (or harsh) and unequal voice, about whose nationality no two persons could be found to agree, and in whose utterance no syllabification could be detected."

At these words a vague and half-formed conception of the meaning of Dupin flitted over my mind. I seemed to be upon the verge of comprehension without power to comprehend - men, at times, find themselves upon the brink of remembrance without being able, in the end, to remember. My friend went on with his discourse.