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"But that Kidd's accumulations were immense, is well known. I took
it for granted, therefore, that the earth still held them; and you will
scarcely be surprised when I tell you that I felt a hope, nearly
amounting to certainty, that the parchment so strangely found, involved
a lost record of the place of deposit."
"But how did you proceed?"
"I held the vellum again to the fire, after increasing the heat; but
nothing appeared. I now thought it possible that the coating of dirt
might have something to do with the failure; so I carefully rinsed the
parchment by pouring warm water over it, and, having done this, I placed
it in a tin pan, with the skull downwards, and put the pan upon a
furnace of lighted charcoal. In a few minutes, the pan having become
thoroughly heated, I removed the slip, and, to my inexpressible joy,
found it spotted, in several places, with what appeared to be figures
arranged in lines. Again I placed it in the pan, and suffered it to
remain another minute. On taking it off, the whole was just as you see
it now."
Here Legrand, having re-heated the parchment, submitted it to my
inspection. The following characters were rudely traced, in a red tint,
between the death's-head and the goat:
53++!305))6*;4826)4+.)4+);806*;48!8'60))85;]8*:+*8!83(88)5*!;
46(;88*96*?;8)*+(;485);5*!2:*+(;4956*2(5*)8'8*;4069285);)6
!8)4++;1(+9;48081;8:8+1;48!85;4)485!528806*81(+9;48;(88;4(+?3
4;48)4+;161;:188;+?;
"But," said I, returning him the slip, "I am as much in the dark as
ever. Were all the jewels of Golconda awaiting me on my solution of
this enigma, I am quite sure that I should be unable to earn them."
"And yet," said Legrand, "the solution is by no means so difficult as
you might be led to imagine from the first hasty inspection of the
characters. These characters, as any one might readily guess, form a
cipher - that is to say, they convey a meaning; but then, from what is
known of Kidd, I could not suppose him capable of constructing any of
the more abstruse cryptographs. I made up my mind, at once, that this
was of a simple species - such, however, as would appear, to the crude
intellect of the sailor, absolutely insoluble without the key."
"And you really solved it?"
"Readily; I have solved others of an abstruseness ten thousand times
greater. Circumstances, and a certain bias of mind, have led me to take
interest in such riddles, and it may well be doubted whether human
ingenuity can construct an enigma of the kind which human ingenuity may
not, by proper application, resolve. In fact, having once established
connected and legible characters, I scarcely gave a thought to the mere
difficulty of developing their import.
"In the present case - indeed in all cases of secret writing - the first
question regards the language of the cipher; for the principles
of solution, so far, especially, as the more simple ciphers are
concerned, depend on, and are varied by, the genius of the particular
idiom. In general, there is no alternative but experiment (directed by
probabilities) of every tongue known to him who attempts the solution,
until the true one be attained. But, with the cipher now before us, all
difficulty is removed by the signature. The pun on the word 'Kidd' is
appreciable in no other language than the English. But for this
consideration I should have begun my attempts with the Spanish and
French, as the tongues in which a secret of this kind would most
naturally have been written by a pirate of the Spanish main. As it was,
I assumed the cryptograph to be English.
"You observe there are no divisions between the words. Had there
been divisions, the task would have been comparatively easy. In such
case I should have commenced with a collation and analysis of the
shorter words, and, had a word of a single letter occurred, as is most
likely, (a or I, for example,) I should have considered
the solution as assured. But, there being no division, my first step
was to ascertain the predominant letters, as well as the least frequent.
Counting all, I constructed a table, thus:
Of the character 8 there are 33.
; " 26.
4 " 19.
+ ) " 16.
* " 13.
5 " 12.
6 " 11.
!1" 8.
0 " 6.
9 2 " 5.
: 3 " 4.
? " 3.
' " 2.
. " 1.
"Now, in English, the letter which most frequently occurs is e.
Afterwards, the succession runs thus: a o i d h n r s t u y c f g l m
w b k p q x z. E however predominates so remarkably that an
individual sentence of any length is rarely seen, in which it is not the
prevailing character.
"Here, then, we have, in the very beginning, the groundwork for
something more than a mere guess. The general use which may be made of
the table is obvious - but, in this particular cipher, we shall only very
partially require its aid. As our predominant character is 8, we will
commence by assuming it as the e of the natural alphabet. To
verify the supposition, let us observe if the 8 be seen often in
couples - for e is doubled with great frequency in English - in such
words, for example, as 'meet,' 'fleet,' 'speed,'seen,' 'been,' 'agree,'
&c. In the present instance we see it doubled less than five times,
although the cryptograph is brief.
"Let us assume 8, then, as e. Now, of all words in the
language, 'the' is the most usual; let us see, therefore, whether they
are not repetitions of any three characters in the same order of
collocation, the last of them being 8. If we discover repetitions of
such letters, so arranged, they will most probably represent the word
'the.' On inspection, we find no less than seven such arrangements, the
characters being ;48. We may, therefore, assume that the semicolon
represents t, that 4 represents h, and that 8 represents
e - the last being now well confirmed. Thus a great step has been
taken.
"But, having established a single word, we are enabled to establish a
vastly important point; that is to say, several commencements and
terminations of other words. Let us refer, for example, to the last
instance but one, in which the combination ;48 occurs - not far from the
end of the cipher. We know that the semicolon immediately ensuing is
the commencement of a word, and, of the six characters succeeding this
'the,' we are cognizant of no less than five. Let us set these
characters down, thus, by the letters we know them to represent, leaving
a space for the unknown -
t eeth.
"Here we are enabled, at once, to discard the 'th,' as forming
no portion of the word commencing with the first t; since, by
experiment of the entire alphabet for a letter adapted to the vacancy we
perceive that no word can be formed of which this th can be a
part. We are thus narrowed into
t ee,
and, going through the alphabet, if necessary, as before, we arrive
at the word 'tree,' as the sole possible reading. We thus gain another
letter, r, represented by (, with the words 'the tree' in
juxtaposition.
"Looking beyond these words, for a short distance, we again see the
combination ;48, and employ it by way of termination to what immediately
precedes. We have thus this arrangement:
the tree ;4(+?34 the
or, substituting the natural letters, where known, it reads thus:
the tree thr+?3h the
"Now, if, in place of the unknown characters, we leave blank spaces,
or substitute dots, we read thus:
the tree thr...h the
when the word 'through' makes itself evident at once. But
this discovery gives us three new letters, o, u and
g, represented by +, ?, and 3.
"Looking now, narrowly, through the cipher for combinations of known
characters, we find, not very far from the beginning, this arrangement,
83(88, or egree
which, plainly, is the conclusion of the word'degree,' and gives us
another letter, d, represented by !.
"Four letters beyond the word 'degree,' we perceive the combination
;46(;88*
"Translating the known characters, and representing the unknown by
dots, as before, we read thus:
th.rtee
an arrangement immediately suggestive of the word'thirteen,' and
again furnishing us with two new characters, i and n,
represented by 6 and *. "Referring, now, to the beginning of the
cryptograph, we find the combination,
53++!
"Translating, as before, we obtain .good,
which assures us that the first letter is A, and that the
first two words are 'A good.'
"To avoid confusion, it is now time that we arrange our key, as far
as discovered, in a tabular form. It will stand thus:
5 represents a
! d
8 e
3 g
4 h
6 i
* n
+ o
( r
; t
? u
"We have, therefore, no less than eleven of the most important
letters represented, and it will be unnecessary to proceed with the
details of the solution. I have said enough to convince you that
ciphers of this nature are readily soluble, and to give you some insight
into the rationale of their development. But be assured that the
specimen before us appertains to the very simplest species of
cryptograph. It now only remains to give you the full translation of
the characters upon the parchment, as unriddled. Here it is:
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