"I wonder!" said he, leaning back and staring at
the ceiling. "Perhaps there are points which have escaped your
Machiavellian intellect. Let us consider the problem in the
light of pure reason. This man's reference is to a book. That
is our point of departure."
"A somewhat vague one."
"Let us see then if we can narrow it down. As I focus my mind
upon it, it seems rather less impenetrable. What indications
have we as to this book?"
"None."
"Well, well, it is surely not quite so bad as that. The cipher
message begins with a large 534, does it not? We may take it as
a working hypothesis that 534 is the particular page to which the
cipher refers. So our book has already become a LARGE book, which
is surely something gained. What other indications have we as to
the nature of this large book? The next sign is C2. What do you
make of that, Watson?"
"Chapter the second, no doubt."
"Hardly that, Watson. You will, I am sure, agree with me that if
the page be given, the number of the chapter is immaterial. Also
that if page 534 finds us only in the second chapter, the length
of the first one must have been really intolerable.
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