| AE | 74=2×37 | IE | 110=2×5×11 | RE | 50=2×5×5 |
| AE | 120=2×2×2×3×5 | IM | 302=2×151 | RMERGL | 198=2×3×3×11 |
| BE | 88=2×2×2×11 | IO | 250=2×5×5×5 | SC | 132=2×2×3×11 |
| CD | 132=2×2×3×11 | IX | 78=2×3×13 | SD | 262=2×131 |
| CFI | 12=2×2×3 | LY | 158=2×79 | SI | 230=2×5×23 |
| CH | 36=2×2×3×3 | JT | 150=2×3×5×5 | SI | 34=2×17 |
| CO | 42=2×3×7 | LL | 367 No factors | SI | 264=2×2×2×3×11 |
| CO | 126=2×3×3×7 | LQ | 164=2×2×41 | SI | 12=2×2×3 |
| CU | 114=2×3×19 | LQX | 6=2×3 | SL | 78=2×3×13 |
| DD | 186=2×3×31 | LU | 124=2×2×31 | SQ | 54=2×3×3×3 |
| DD | 116=2×2×29 | LU | 110=2×5×11 | SV | 27=3×3×3 |
| DE | 285=5×57 | LU | 234=2×3×3×13 | SV | 63=3×3×7 |
| DL | 218=2×109 | LX | 66=2×3×11 | SV | 90=2×3×3×5 |
| DN | 14=2×7 | LXB | 132=2×2×3×11 | TD | 47 No factors |
| DQ | 120=2×2×2×3×5 | LY | 158=2×79 | TD | 165=3×5×11 |
| DU | 36=2×2×3×3 | ME | 22=2×11 | TD | 96=2×2×2×2×2×3 |
| DU | 24=2×2×2×3 | MU | 24=2×2×2×3 | TN | 239 No factors |
| DU | 38=2×19 | MU | 240=2×2×2×2×3×5 | TS | 14=2×7 |
| DU | 165=3×5×11 | MU | 18=2×3×3 | TS | 156=2×2×3×13 |
| EA | 30=2×3×5 | ND | 47 No factors | TSI | 50=2×5×5 |
| EB | 78=2×3×13 | NE | 48=2×2×2×2×3 | UBRE | 12=2×2×3 |
| EC | 180=2×2×3×3×5 | NE | 18=2×3×3 | UD | 60=2×2×3×5 |
| ECO | 126=2×3×3×7 | NE | 192=2×2×2×2×2×2×3 | UDA | 270=2×3×3×3×5 |
| EES | 14=2×7 | OB | 6=2×3 | UL | 114=2×3×19 |
| EF | 105=3×5×7 | OB | 234=2×3×3×13 | ULX | 198=2×3×3×11 |
| EI | 8=2×2×2 | OE | 93=3×31 | UY | 89 No factors |
| EI | 152=2×2×2×19 | OI | 144=2×2×2×2×3×3 | UZ | 162=2×3×3×3×3 |
| EQ | 88=2×2×2×11 | OO | 7 No factors | VI | 148=2×2×37 |
| EQ | 264=2×2×2×3×11 | OY | 6=2×3 | VT | 33=3×11 |
| EQ | 44=2×2×11 | OY | 46=2×23 | XQ | 114=2×3×19 |
| EQE | 176=2×2×2×2×11 | OYMU | 6=2×3 | XQ |
144=2×2×2×2×3×3 |
| ER | 12=2×2×3 | PD | 75=3×5×5 | XU | 99=3×3×11 |
| ES | 78=2×3×13 | QBL | 24=2×2×2×3 | YE | 184=2×2×2×23 |
| ET | 135=3×3×5 | QC | 95=5×19 | YL | 106=2×53 |
| ET | 9=3×3 | QE | 108=2×2×3×3×3 | YL |
144=2×2×2×2×3×3 |
| ET | 54=2×3×3×3 | QE | 68=2×2×17 | YM | 6=2×3 |
| ET | 31 No factors | QR | 132=2×2×3×11 | YRO | 12=2×2×3 |
| HE | 245=5×7×7 | QTO | 210=2×3×5×7 | ZE | 6=2×3 |
| HOBE | 66=2×3×11 | QX | 198=2×3×3×11 | ZH | 183=3×61 |
Out of one hundred and one recurring pairs we have fifty with the factors 2×3=6; out of twelve recurring triplets, nine have these factors; and the four recurring groups of four or more letters all have these factors. The percentages are respectively 49.5%, 75% and 100% and we may be certain from this that six alphabets were used. But, before the six frequency tables are made up, there is one more point to be considered; why are there so many recurring groups which do not have six as a factor? The answer is that one or more of the alphabets is repeated in each cycle; that is, a key word of the form HAVANA has been used. If this were the key word, the second, fourth and sixth alphabets would be the same. We will see later that in this example the second and sixth alphabets are the same and this introduces the great number of recurring groups without the factor 6.
We will now proceed to make a frequency table for each alphabet. As the message is written in thirty columns, we take the first, seventh, thirteenth, etc., as constituting the first alphabet; the second, eighth, fourteenth, etc., as constituting the second alphabet and so on. The prefix and suffix letter is noted for each occurrence of each letter. The importance of this will be appreciated when the form of the frequency tables is examined. None bears any resemblance to the normal frequency table except that each is evidently a mixed up alphabet. The numbers after “Prefix” and “Suffix” refer to the alphabet to which these belong, for convenience in future reference.
Frequency Tables
| FirstAlphabet | Second Alphabet |
| Letter | | Prefix (6) | Suffix (2) | | Letter | | Prefix (1) | Suffix (3) |
| A | 111 | 3 | DUD | ESF | A | | 0 | | |
| B | 11111111 | 8 | OOOFEEOS | EOESYSCY | B | 111 | 3 | TQQ | ALL |
| C | | 0 | | | C | 1 | 1 | B | C |
| D | 1111 | 4 | TYT | DJUD | D | 111111 | 6 | DTPDXT | LBCNVE |
| E | 1 | 1 | E | S | E | 11111111111 1 | 1 | ABNBNINRRYN | EOATLATYQTF |
| F | | 0 | | | F | 111 | 3 | QIA | IQF |
| G | | 0 | | | G | 11 | 2 | RR | LL |
| H | | 0 | | | H | 1 | 1 | Z | O |
| I | 11111111 | 8 | EOFFEOVS | OSEFQYJ | I | | 0 | | |
| J | | 0 | | | J | 1111 | 4 | ZLDI | ILCR |
| L | 1 | 1 | O | J | L | 1 | 1 | T | L |
| M | 1 | 1 | F | O | M | 1 | 1 | V | I |
| N | 1111 | 4 | FEDU | EEEE | N | 1 | 1 | P | R |
| O | 1 | 1 | E | O | O | 1111111 | 7 | OIBQRMR | AOEYYYY |
| P | 11 | 2 | GE | ND | P | 1 | 1 | T | Y |
| Q | 1111 | 4 | UEOE | OFBB | Q | 11111 | 5 | XXITX | OIRCR |
| R | 1111111 | 7 | EEEYYBB | GSGOOEE | R | | 0 | | |
| S | 1 | 1 | D | V | S | 11111111 | 8 | REIATBVB | LMLIQQDV |
| T | 11111111 | 8 | JUJMQYVF | LDSBPQDT | T | 1 | 1 | T | N |
| U | | 0 | | | U | 111 | 3 | XDZ | CLL |
| V | 11 | 2 | UF | MS | V | 1 | 1 | S | I |
| X | 111111 | 6 | YQTQQA | QUQDYQ | X | | 0 | | |
| Y | 1 | 1 | O | E | Y | 1111 | 4 | BIXB | LCTL |
| Z | 111 | 3 | UUM | JHU | Z | | 0 | | |
| ThirdAlphabet | FourthAlphabet |
| Letter | | Prefix (2) | Suffix (4) | | Letter | | Prefix (3) | Suffix (5) |
| A | 1111 | 4 | OEEB | CERE | A | | 0 | | |
| B | 1 | 1 | D | G | B | | 0 | | |
| C | 111111 | 6 | JUDYQC | PYNUMU | C | 11111 | 5 | LRAQT | HHDDL |
| D | 1 | 1 | S | D | D | 11 | 2 | QD | LU |
| E | 111 | 3 | EOD | SST | E | 11111111 | 8 | MQAYQALR | JICHCQCC |
| F | 11 | 2 | FE | SS | F | | 0 | | |
| G | | 0 | | | G | 1111 | 4 | BOIY | UCIH |
| H | | 0 | | | H | 1 | 1 | Y | E |
| I | 111111 | 6 | JMSFQV | MGUXRX | I | | 0 | | |
| J | | 0 | | | J | | 0 | | |
| L | 11111111111111 | 14 | DGLSJSUEGYBBUY | RMCSPYXQXEUVXL | L | 1 | 1 | L | T |
| M | 1 | 1 | S | E | M | 11111 | 5 | LIYYC | UUUUU |
| N | 11 | 2 | DT | PX | N | 111 | 3 | TCV | DZL |
| O | 1 | 1 | O | G | O | | 0 | | |
| P | | 0 | | | P | 111 | 3 | LCN | DJU |
| Q | 1111111 | 7 | EQSFHSE | ETESCDT | Q | 1 | 1 | L | M |
| R | 1111 | 4 | NQQJ | CXEZ | R | 111 | 3 | LAI | MNM |
| S | | 0 | | | S | 111111111 | 9 | LEETQYFTF | ODHCEVCII |
| T | 1111 | 4 | EEEY | NSCS | T | 1111 | 4 | QQVE | OOIG |
| U | | 0 | | | U | 1111 | 4 | ICLC | PDLY |
| V | 11 | 2 | SD | TN | V | 1 | 1 | L | U |
| X | | 0 | | | X | 1111111 | 7 | LILRILN | PZBUBL |
| Y | 111111 | 6 | OPOOOE | ESHMMG | Y | 11 | 2 | LC | DLJ |
| Z | | 0 | | | Z | 1 | 1 | R | H |
| FifthAlphabet | SixthAlphabet |
| Letter | | Prefix (4) | Suffix (6) | | Letter | | Prefix (5) | Suffix (1) |
| A | | 0 | | | A | 1 | 1 | B | X |
| B | 11 | 2 | XX | EA | B | 11 | 2 | UU | RR |
| C | 1111111 | 7 | GDDSDSD | OOFFOEV | C | | 0 | | |
| D | 111111 | 6 | SCPYNCU | UEUUQTQ | D | 1111 | 4 | UNLU | ANSA |
| E | 11 | 2 | SH | TP | E | 1111111111111 | 13 | MHOIDPZZMBQUC | RREOIQPNRIBQB |
| F | | 0 | | | F | 1111111 | 7 | PCCJEOC | NIIBMVT |
| G | 1 | 1 | U | T | G | 1 | 1 | U | P |
| H | 111111 | 6 | CCSDGZ | EOOYYS | H | | 0 | | |
| I | 11111 | 5 | EGTSS | EYOMV | I | | 0 | | |
| J | 111 | 3 | EPX | UOP | J | 11 | 2 | UM | TT |
| L | 111111 | 6 | YDUCNX | UDYQQU | L | | 0 | | |
| M | 111 | 3 | RQR | EJE | M | 11 | 2 | UI | TZ |
| N | 1 | 1 | R | D | N | | 0 | | |
| O | 111 | 3 | STT | ETF | O | 111111111 | 9 | HCJCHCVIG | BLIBBIQYB |
| P | 11 | 2 | UX | FE | P | | 0 | | |
| Q | 1 | 1 | E | E | Q | 1111 | 4 | DDLL | XTXX |
| R | | 0 | | | R | | 0 | | |
| S | | 0 | | | S | 11 | 2 | HT | BI |
| T | 1 | 1 | L | S | T | 111 | 3 | OED | DDX |
| U | 1111111111 | 10 | MMGPXMMVMD | JDGUMYEBBD | U | 1111111 | 7 | JDDDLUL | ZTVAQZN |
| V | 1 | 1 | S | O | V | 11 | 2 | CI | TI |
| X | | 0 | | | X | 1 | 0 | I | |
| Y | 1 | 1 | U | F | Y | 11111 | 5 | IHLUH | XDRRT |
| Z | 11 | 2 | XN | EE | Z | | 0 | | |
We will now set down some of the determinations which can be made at once from these frequency tables. Clearly several mixed alphabets have been used. As was to be expected from the analysis of the recurring groups, we note that the frequency tables for alphabets 2 and 6 are of so nearly the same general form that certainly these two alphabets are one and the same. If a Spanish word has been used as a key word, this means that A is probably represented by a vowel in these two alphabets and probably equals A or O, because these two letters are such common finals in Spanish.
1st Alphabet. Probable vowels T, X; probable common consonants, B, I, N, R. We conclude this because of the frequency of occurrence of T and X and the variety of their prefixes and suffixes. On the other hand, B, I, N, and R have for prefixes and suffixes, in a majority of cases, E, F, O and S which are the probable vowels in the 2d and 6th alphabets.
2d and 6th Alphabets.—Probable vowels E, F, O, S; probable common consonants, D, J, Q, U, Y.
3d Alphabet.—Probable vowels C, I, L; probable common consonants A, Q, T, Y.
4th Alphabet.—Probable vowels, E, G, S, T; probable common consonants, C, M, N, P, U, X.