476 · 438.476.242.979 · 609
Mariage · le mariage du Prince Royal · Princesse

Hanover and Berlin → J. H. von Ilten · numeric syllabic codes, French and German · 1697–1706 · read at the time

Letters to Jobst Hermann von Ilten, 1697–1706

Georg Ludwig (George I)
fromGeorg Ludwig (George I)

Four Hanoverian code letters to Ilten, listed in this catalogue as “not deciphered”. Each one carries the decipherment written over its code in Ilten’s office, here transcribed and checked. They concern the Prussian marriage of Sophia Dorothea.

Daniel Bourdeau · posted

Method: read from existing decipherment · Extent: complete

At a glanceRead from existing decipherment · 485 of 492 code groups

The letters
Johann Ernst von Hattorf (Hanover, 7 November 1697 and 31 January 1706), Johann Wilhelm von Heusch (Berlin, 10 October 1705) and Elector Georg Ludwig (Hanover, 25 May 1706) to Jobst Hermann von Ilten, the Hanoverian minister, in 1706 envoy extraordinary at Berlin.
Where
Gottfried Wilhelm Leibniz Bibliothek, Hanover, Ms XXIII 1245:4 ff. 212–213 and 1245:7 ff. 201–204, 288–289, 329–330, all online in the GWLB digital library. Kalliope notes each one as “Dechiffrierter Brief”.
The cipher
Two numeric syllabic codes with homophones and nulls: code A in 1697, and code B in 1705–06, used for French and German alike.
How it was checked
The office wrote the plain text over every code run. It was transcribed here, and every group was checked against its other occurrences. No gloss contradicts another.
What it says
In 1697 the Elector wants discord sown between Kolbe and Barfus at Berlin. In 1705–06 the letters work towards the marriage of his daughter Sophia Dorothea to the Prussian Crown Prince, through the Ober-Cammerherr Kolbe von Wartenberg.
Still open
Seven groups the interliner left without a gloss, none of them needed for the sense.
Hattorf's letter of 1697: lines of numbers with French words written over them in a lighter ink
Hattorf to Ilten, 7 November 1697, f. 212v. The code runs (“75.256.505” = Barfus, “262.70” = gagner, “347.77.96.135.100.476” = l’amitié) carry their decipherment in a lighter ink above. Image: Gottfried Wilhelm Leibniz Bibliothek Hannover, Ms XXIII 1245:4 f. 212v, via the GWLB digital library (public domain).

01 What the catalogue said, and what the record says

The project’s scan of 23 September 2026 listed six items in the Ilten papers at the GWLB as “not deciphered”. The Kalliope records say the opposite. The four letters of 1697–1706 are each noted Dechiffrierter Brief, a deciphered letter, and the two of 1743 Teilweise dechiffrierter Brief. The scan also said the images were not online. They are: the GWLB’s Kitodo library has the Receuil de Lettres a Jobst Hermann d’Ilten, parts I–IV, VII and VIII, in public-domain colour scans. Its search form has to be submitted as a POST with the page’s own token, and a plain search URL returns nothing, which is probably why the scan missed them.

The two 1743 letters, to Johann Georg von Ilten, turned out to be something else: one of them carries no decipherment, and none was found elsewhere in the papers. They have their own write-up.

Kalliope gives “Herzog Georg Wilhelm” as the sender of the letter of 25 May 1706. The letter is signed Georg Ludwig Churfürst and countersigned by Hattorf, and Kalliope’s own creator field names Georg I.

02 The codes

Heusch's letter of 1705 with code groups and their interlinear decipherment
Heusch to Ilten, Berlin, 10 October 1705, f. 202r: “le point de Mariage”, “au Gr. Chambellan”, “le mariage du Prince Royal avec ladte Princesse”, “ce Ministre”, all written over code B. Image: Gottfried Wilhelm Leibniz Bibliothek Hannover, Ms XXIII 1245:7 f. 202r, via the GWLB digital library (public domain).

03 The letters

Transcribed from the scans. Words in code are in italics, as the interliner deciphered them. The spelling is kept.

Hattorf to Ilten, Hanover, 7 November 1697

S. A. E. en signant la depeche… me dit, qu’il luy estoit venu une pensée dont je devois vous informer, qu’il seroit avantageux à ses affaires si l’on pouvoit mettre la discorde entre Colbe et Barfus et gagner l’amitié de l’un des deux. S. A. E. veut croire que vous puissiez faire cela par le moyen de la femme du premier avec laquelle on luy a dit que vous estes extremement bien. Je ne tiens pour mon particulier l’affaire aussy aisée…

“Colbe” is Johann Kasimir Kolbe, later Count Wartenberg, and Barfus is Field Marshal Johann Albrecht von Barfus, both leading men at the Berlin court in 1697. The “femme du premier” is therefore Kolbe’s wife.

Heusch to Ilten, Berlin, 10 October 1705

The chamberlain Count Wartensleben, back from Hanover, had Heusch told, par Monsr. de Berlips “pour mieux cacher nostre commerce”, that he had set out the Elector’s good intentions to the King. He had also spoken well of Madame la Princesse, fille de S.A.El., without touching on le point de Mariage. He had raised it with the Grand Chamberlain instead, ce Ministre, who was committed de parole to another match but might be won over. Neither Madame de Bulow nor Mademoiselle de Pelnitz must appear to have a hand in it, and it can succeed only par le Canal du Gr. Chambellan.

Hattorf to Ilten, Hanover, 31 January 1706

Ilten’s two letters reached the Elector en ses mains propres, seen by no one but Hattorf. When the mariage is raised with him again in Berlin, Ilten is to let it be understood que vous n’en estes pas instruit, since it is not la coutume d’offrir aussi bientost les Princesses de cette maison. There is a clear postscript on Goertz’s rheumatism, Eltz’s mission to Mainz and Trier, the Lübeck see, and the fear that Charles XII might march out of Poland.

The Elector to Ilten, Hanover, 25 May 1706

German letter of 1706 with lines of code and Kurrent glosses above them
Georg Ludwig to Ilten, 25 May 1706, f. 329r: code B carrying German, glossed in Kurrent. The first code line reads “der König in Preußen würde sich selbst persöhnlich”. Image: Gottfried Wilhelm Leibniz Bibliothek Hannover, Ms XXIII 1245:7 f. 329r, via the GWLB digital library (public domain).

…daß ihr Ursache zu glauben zu haben vermeinet, der König in Preußen würde sich selbst persöhnlich umb die Princessin unsere Tochter für den Cron Printzen in Preußen ansprechen wollen, in maßen der Ober-Cammerherr euch zu erkennen gegeben… Wann ihr nun mit guter maniere abwenden könnet, daß solche persöhnliche anwerbung unterbliebe, so wird es Uns sehr lieb seyn…

The Elector expects the King to come in person to ask for his daughter’s hand. Ilten is to prevent the visit discreetly, “bloss als für euch”, by insinuations to the Ober-Cammerherr alone. Sophia Dorothea married the Crown Prince Frederick William on 28 November 1706.

04 Method and check

The four letters were fetched from the GWLB METS files. The clear text, the 492 code groups and the glosses were transcribed from crops of the master images, and a table was built of every group with every gloss it carries. Where a group recurs it carries the same value, in French and German alike, and nothing contradicts. That consistency is the check. It also separates code A from code B and shows the nulls 62 and 91. No key sheet for either code is known, and none was rebuilt: the glosses already give the reading.

05 What remains open

06 Sources

Transcriptions, the group table and the profile are in ilten1697/.