In 2014 Maryland-based costume collector Sara Rivers-Cofield discovered an encrypted note in an antique silk dress. This cryptogram is unsolved to date.

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“A curator at work, a collector at home.” This is how Sara Rivers-Cofield describes her interest in antique costumes. In addition, she writes a blog on the subject (Commitment to Costumes). Three years ago she acquired a piece that she describes as a “mid-1880s two-piece bustle dress of bronze silk with striped rust velvet accents and lace cuffs”.


The cryptogram

All this doesn’t seem terribly relevant for the target group of Klausis Krypto Kolumne. However, this changed when Sara made an interesting discovery. On her blog she wrote:

The […] discovery arose when I turned the skirt inside out; there was a pocket! Okay, neat, but not earth shattering. Lots of 19th-century dresses had pockets. But then things got weird. I mean usually built-in pockets don’t play hard-to-get, but even with help from my perennial antiquing partner, my mom, it took a while to get to the thing. Instead of being easily accessed through an inconspicuous slit in the over-skirt, this pocket opening is completely concealed by the over-skirt; as in, you have to hike up the draped silk, expose the cotton under-skirt, and generally disrupt the whole look to get at the pocket. Also, thanks to some tacked areas sewn into the skirt to make it drape properly, it wouldn’t have been possible to get at the pocket at all without causing a rip if someone had the dress on. We had to do some seriously careful maneuvering to get at it.

Why would anyone make a pocket so inaccessible? Was the dress altered without taking the pocket into account? Or was the pocket added because Ms. Bennett had need of a super secret hidey-hole on her person? Maybe she needed it to smuggle coded messages or something?! In general, I feel like I’m getting too old for that level of fantastical speculation, but I feel compelled to mention the possibility because in this case it might be TRUE!

Thank goodness my mom was there to share my excitement when I finally felt my way to the pocket and pulled out a clump of paper, balled up and wrinkled as if it had been through the laundry. It consisted of two translucent sheets, both of which exhibited writing.

The writing, as it turned out, was encrypted. Here are the two sheets:



Here’s a transcription:

Sheet 1

Smith nostrum linnets gets none event
101pm Antonio rubric lissdt full ink

Make Snapls barometer nerite
Spring wilderness lining one reading novice
   7 bale
Vicksbg rough rack lining my nanny
6 bucket

Saints west lunar malay new markets
    7 bale
Seawoth merry lemon sunk each
Cairo rural lining new johnson none
   7 ice
Missouri windy lunar new Johnson none
   7 bucket
Celliette memorise legacy Dunk dew
Concordia mammon layman null events

Concordia meraccons humus nail menu
6 barrack

Sheet 2

1113 PM Bismark Omit leafage buck bank

Paul Ramify loamy event false new
7 event

Helena Onus lofo usual each
Greenbay nobby peped
1124 P Assin Onays league new forbade event
Cusin Down
Harry Noun  Lertal laubul palm novice
    7 event
Mimedos Noun Jammyleafage beak dobbin
   7 ice
Calgary Duba Unguard confute duck tagan
7 egypt
Knit wrongful hugs duck fagan
6 each

Calgary Noun Signor loamy new ginnet event
Landing Noun Rugins legacy duch baby
7 ice


How can it be solved?

It is not difficult to see what kind of encryption the author of the hidden note applied. He or she apparently used a codebook to transform the cleartext word by word to the ciphertext. Codebooks were very popular before encryption machines came up around 1925. The following picture shows a codebook page (it’s not the one that was used for the silk dress cryptogram):

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Kommentare (5)

  1. #1 Rich SantaColoma
    13. Mai 2017

    I would like to add another suggestion to the list:

    It seems possible that the note being so “hidden” in the lining may have been inadvertent, not purposeful. When sewing (I’ve sewn many shirts, dresses, capes, suits, myself), one needs to always be mindful not to pick up extraneous items… bits of pattern, lose notions, fabric scraps. I mean, the note may have innocently ended up being sewn into the dress, not secreted.

    And then the content: With words like “lining”, “knit”, and “ducK”, being somewhat relate to tailoring, perhaps this list is simply a reminder of sewing tasks… apparel names, with quantities, fabric types, colors, and so forth… then, also, checked off… showing completion of the tasks…. like “I have to remember to put new linings in the Cairo Rural dresses”.

    So a code of sorts, yes… put perhaps a personal, “of the cuff” set of shorthand notes for a seamstress?

  2. #2 Kyrmse
    São Paulo, Brasil
    13. Mai 2017

    Could the words be the result of an N+7 type code? In this case you would take the 7th word after the given cleartext word in a given dictionary or wordlist.
    Of course the added number might be different according to the word’s class: +7 for nouns, -4 for adjectives etc….
    That might explain the repetition of “loamy”, “duck” “lunar” and so on.

  3. #3 Karsten Hansky
    14. Mai 2017

    I received a message from John McVey. John most probably identified the codebook which was used for these messages (“I suspect the code words are from Slater. Do not know how it was used in that instance, however.”). We have to check and confirm whether his idea is correct.

    The crux of the matter is that Slater code results not in the original text but in a series of numbers. In many cases the code was used in a way that the numbers refer to the entries in another codebook. Sometimes the numbers indicate entries in the Slater code itself but you have to know the offset which has been added.

    So it seems to be a step towards the solution but not the solution itself…

    Klaus will publish the results in a few days.

  4. #4 Thomas
    15. Mai 2017

    Unless the process of transforming the plaintext numbers into code text numbers (addition, subtraction, transposing…) is known, the codewords cannot be decoded with Slater’s tables. There are countless ways of transforming the numbers which yield meaningless codetext, see the “The Queen is the supreme power in the Realm” examples starting on p. vii,

  5. #5 Thomas
    15. Mai 2017

    Moreover the striking large number of words beginning with ‘l’ may argue against a codebook (with a normal distribution of first letters).