56169 41276 18427 47372 33900 …
What is the · object · British government · request · I …

Roosevelt → Hay · State Department Red Cipher of 1876 · 27 May 1903 · key identified by a contributor

Roosevelt to Hay on Britain’s request and the trip to Kiel, 27 May 1903

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A coded telegram from Theodore Roosevelt to the Secretary of State, listed with no decoding, was deciphered with the State Department’s Red Cipher of 1876, which William Echols matched to it: Roosevelt asks what Britain’s request is and puts any English port after the trip to Kiel.

Daniel Bourdeau · posted

Method: read after matching with key from external sources · Extent: complete

Contributed by William Echols (solution) · Also credited · John H. Haswell (key or decipherment used) · Florentijn van Kampen (pointer to a source)

At a glanceExternal key matched · complete

The telegram
A typed telegram of 27 May 1903 from Theodore Roosevelt, to the Secretary of State, John Hay; 23 five-digit groups, four spelled letters, several clear words (of, think, it, junketing, at, the).
Where
Library of Congress, Theodore Roosevelt Papers, reel 413, frame 0026 (Theodore Roosevelt Center record o266250); ledger entry 762, which listed it with no decoding.
The cipher
The State Department Red Cipher of 1876 (J. H. Haswell): a codebook of five-digit groups, the first three digits the page and the last two the entry, with a spelling table for names.
How it was deciphered
William Echols submitted the identification of the codebook and the reading, which GPT-6.1 Sol produced autonomously in Codex; the key was not recovered from the ciphertext. The project could see neither the scan nor the codebook pages and checked only that the 23 groups give a coherent telegram.
What it says
What is the object of the British government’s request? Roosevelt does not think the trip should be made a junketing one, and any call at an English port should come after the trip to Kiel.
Still open
No comparison with the scan or the codebook pages; the squadron is the contributor’s gloss; Hay’s received copy and printed editions were not searched.
Credit
The transcription, the identification of the key and the reading are William Echols’s (issue #353), made with GPT-6.1 Sol in Codex; Florentijn van Kampen’s study of the State Department codes supplied a clue and the pointer to the digitized codebook. The scan and the codebook pages were not seen here and are not reproduced.

01 The telegram

A typed telegram of 27 May 1903 from Theodore Roosevelt, to the Secretary of State, John Hay: Library of Congress, Manuscript Division, Theodore Roosevelt Papers, reel 413, frame 0026 (Theodore Roosevelt Center record o266250). It is in numbers, with several clear words (of, think, it, junketing, at, the) and two cancelled groups. The ledger (catalogue 762) listed it with “no decoding noted”. William Echols read it with GPT-6.1 Sol in Codex and sent the transcription, the key and the reading; the project could not reach the scan or the codebook and checked the submission for coherence.

02 The code

The groups are from the State Department’s Red Cipher of 1876, compiled by John H. Haswell: a codebook in which each five-digit group stands for a phrase, the first three digits giving the printed page and the last two the entry. The plain side is the column headed “Message or true reading”. The codebook is in the National Archives (catalog id 417267710, microfilm T1171); a repository note says it is also printed in Weber (1979), which was not consulted here. Names the book lacks are spelled with a table keyed by the first group of the message, here 56169: the coded letters U A W C give K I E L. Florentijn van Kampen’s study of the State Department codes supplied the clue for the group 10000 and pointed to the digitized book. The key was found to fit, not recovered from the ciphertext.

GroupEntryGroupEntry
56169What is the34036If they
41276Object53279Touch
18427British government28040English
47372Request43758Port
33900I36556It should
52844Do not think16440Be
25361Desirable11698After the
52597That the53149To
53664Trip (twice)34553In my
38401Should be made36885Judgment
10000A41798One

These entries are the contributor’s, from codebook pages that the project could not see. What was checked here is the count and the sense: the transcription has 23 groups (22 distinct), each with an entry in the table above.

03 The reading

What is the object of British governments request? I do not think [think] it desirable that the trip should be made a junketing one. If they touch at English port it should be after the [the] trip to Kiel in my judgment.

That is the contributor’s literal decipherment; the brackets mark clear words that the book’s entries repeat. Read as a sentence: Roosevelt asks what the object of the British government’s request is, does not think it desirable that the trip should be made a junketing one, and says that if they call at an English port it should be after the trip to Kiel. The contributor’s gloss is that Roosevelt asked what Britain wanted from a visit by the American squadron; the history is his and was not checked here.

04 What remains uncertain

Full texts

The transcription and the decryption of every document on this page, so that the reading can be used and checked. Short files are shown here; all are in the repository.

Telegram of 27 May 1903, Roosevelt to Hay (LoC Roosevelt Papers reel 413 frame 0026)

Roosevelt, asks the Secretary of State what the object of the British government's request is, says he does not think it desirable that the trip should be made a junketing one, and says that if they touch at an English port it should be after the trip to Kiel, in his judgment.

Transcription

transcription.txt

# Theodore Roosevelt Papers, Library of Congress, reel 413, frame 0026; Theodore Roosevelt Center record o266250. Roosevelt to John Hay, 27 May 1903.
# Transcription as given by the contributor (William Echols, issue #353). A [cancelled] mark is a cancelled group.
56169 41276 of 18427s 47372? 33900 52844 think
it 25361 [cancelled] 52597 53664 38401 10000 junketing 41798.
34036 53279 at [cancelled] 28040 43758 36556 16440 11698 the
53664 53149 U a w c 34553 36885.
Decryption

decryption.txt

# Literal decipherment (the contributor's): the groups replaced by their entries, clear words as written; brackets mark clear words repeated by the decipherment.
What is the object of British governments request? I do not think [think]
it desirable that the trip should be made a junketing one.
If they touch at English port it should be after the [the]
trip to Kiel in my judgment.
Reading

reading.md

# Telegram of 27 May 1903, the text read

What is the object of the British government's request? I do not think it desirable that the trip should be made a junketing one. If they touch at an English port, it should be after the trip to Kiel, in my judgment.

The literal decipherment has no possessive apostrophe in "governments" and repeats "think" and "the"; the sentence above normalises those and adds the article before "English port" (decipherment: "at English port").

Key: key_excerpt.tsv

05 Sources

The documentation, the key excerpt, the transcription, the reading and the check are in targets/roosevelt1903.

Cite this page

William Echols and Daniel Bourdeau, “Roosevelt to Hay on Britain’s request and the trip to Kiel, 27 May 1903”, Cyphersolver, posted 9 November 2026, https://cyphersolver.com/roosevelt1903.html.