a matter of course, to simplicity, if not
deliberately induced to it as a matter of choice. You will remember,
perhaps, how desperately the Prefect laughed when I suggested, upon our
first interview, that it was just possible this mystery troubled him so
much on account of its being so very self-evident."

"Yes," said I, "I remember his merriment well. I really thought he would
have fallen into convulsions."

"The material world," continued Dupin, "abounds with very strict
analogies to the immaterial; and thus some color of truth has been
given to the rhetorical dogma, that metaphor, or simile, may be made
to strengthen an argument, as well as to embellish a description. The
principle of the vis inertiae, for example, seems to be identical in
physics and metaphysics. It is not more true in the former, that a large
body is with more difficulty set in motion than a smaller one, and that
its subsequent momentum is commensurate with this difficulty, than it
is, in the latter, that intellects of the vaster capacity, while more
forcible, more constant, and more eventful in their movements than those
of inferior grade, are yet the less readily moved, and more embarrassed
and full of hesitation in the first few steps of their progress. Again:
have you ever noticed which of the street signs, over the shop-doors,
are the most attractive of attention?"

"I have never given the matter a thought," I said.

"There is a game of puzzles," he resumed, "which is played upon a map.
One party playing requires another to find a given word--the name of
town, river, state or empire--any word, in short, upon the motley and
perplexed surface of the chart. A novice in the game generally seeks to
embarrass his opponents by giving them the most minutely lettered names;
but the adept selects such words as stretch, in large characters, from
one end of the chart to the other. These, like the over-largely lettered
signs and placards of the street, escape observation by dint of being
excessively obvious; and here the physical oversight is precisely
analogous with the moral inapprehension by which the intellect suffers
to pass unnoticed those considerations which are too obtrusively and too
palpably self-evident. But this is a point, it appears, somewhat above
or beneath the understanding of the Prefect. He never once thought
it probable, or possible, that the Minister had deposited the letter
immediately beneath the nose of the whole world, by way o