Mark Knowles > 30-04-2026, 03:21 PM
Mark Knowles > 30-04-2026, 03:55 PM
(30-04-2026, 03:15 PM)DG97EEB Wrote: You are not allowed to view links. Register or Login to view.Hi Mark,
I ran a combination GPT and Claude.. Hope it helps
Ed
DG97EEB > 30-04-2026, 04:04 PM
(30-04-2026, 03:55 PM)Mark Knowles Wrote: You are not allowed to view links. Register or Login to view.(30-04-2026, 03:15 PM)DG97EEB Wrote: You are not allowed to view links. Register or Login to view.Hi Mark,
I ran a combination GPT and Claude.. Hope it helps
Ed
Thanks for that.
When I look at these kinds of AI researches as with the previous stuff I tried with GPT and Gemini I don't know how to react. My initial reaction is that this is brilliant and very impressive. However when I start to work through the details I am not sure. First, I wonder to what extent it is feeding back to me in a slightly garbled/misinterpreted form what I have posted on Nick Pelling's blog as I have posted a lot about the ciphers that I have located. However, funnily enough I like it's confidence which I find encouraging. I find the reference to "Andrea Barbarigo’s private merchant cipher" intriguing. I have been in touch with Dr. Iordanou before, so I could follow that up. Paolo Bonavoglia says he has searched the Venice archives for diplomatic ciphers of that period thoroughly, so either he hasn't searched it as thoroughly as he thinks or there isn't any more to be found there. It seems to not have picked up on the 1397 Milanese cipher in the Chronicles of Lucca by Giovanni Sercambi as the earliest example of homophones we know of.
It is right that the State Archives of Mantua, Modena and Florence Archives need to be searched from top to bottom as they have already yielded much interesting materials, but there may be more to be found there.
It may be worth confirming that I have seen the following that it mentions:
1404–1418 enciphered correspondence
Jacobo de Faitinellis, Dino ser Paci, Iohannello Thieri, Guido da Pietrasanta, Nicolao da Moncicoli, Nicolao Arnolfini.
Foreign Correspondence, b. 25, sez. 3, Rome
Look for the 1426–1430 enciphered letters: Ricardo de Mutiliana, Pandolfo Malatesta, unsigned Rome letter, Francesco de Catalenis.
---
The tendency of these AI to hallucinate or just misunderstand what was previously been written makes me wonder whether it's references are genuine and correctly dated.I think it would be worth asking the AIs for the precise "shelfmark" for these ciphers and where they saw the references to them.
I like to think that I am not so proud that I care where a new lead comes from and that I will follow it up regardless.

eggyk > 30-04-2026, 05:23 PM
(30-04-2026, 12:09 PM)Mark Knowles Wrote: You are not allowed to view links. Register or Login to view.I am always looking for ways to find new examples of early 15th century ciphers. As those who are familiar with my online OneDrive archive know I have collected many images of examples of those and there are still some that I haven’t uploaded to my OneDrive. However, I continue to try to increase my collection. So, I have been experimenting with tools like Gemini and ChatGPT to see if they can help generate any new leads. I haven't found anything definitely interesting yet, although they have given me food for thought. However, I wonder if anyone else has experience doing this kind of research.
Stefan Wirtz_2 > 30-04-2026, 07:01 PM
JoJo_Jost > 30-04-2026, 08:51 PM
DG97EEB > 30-04-2026, 10:21 PM
Mark Knowles > 30-04-2026, 10:41 PM
(30-04-2026, 10:21 PM)DG97EEB Wrote: You are not allowed to view links. Register or Login to view.Have you read this paper, Mark?
You are not allowed to view links. Register or Login to view.
Mark Knowles > 30-04-2026, 10:52 PM
(30-04-2026, 10:21 PM)DG97EEB Wrote: You are not allowed to view links. Register or Login to view.Have you read these papers, Mark?
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# Direct links to all retrieved sources
## Somogyi corpus (cipher-related publications)
**Somogyi 2016** — Caratteristiche strutturali di cifrari monoalfabetici italiani nei secoli XIV e XV
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**Somogyi 2020a** — Sifrírozási szabályok késő középkori rejtjelkulcsok tükrében (Hungarian)
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**Somogyi 2020b** — Kapcsolódások és összefüggések késő középkori rejtjelezési dokumentumok között, in *Vestigia 3* (Hungarian)
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- Academia.edu mirror: You are not allowed to view links. Register or Login to view.
**Somogyi 2023** — Kéziratos szöveg(re)produkció Itáliában a kora újkor kezdetén, in *Aut lego vel scribo* (Hungarian)
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**Somogyi 2025** — Segmentazione testuale in lettere di cancelleria dell'età premoderna
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**Somogyi 2022** (status: forthcoming/unverified) — Giuliano Caprili magyarországi levelei, in *Studia Agriensia* 39
- No direct URL surfaced. To check: Dobó István Vármúzeum publications page.
## Palma, Palma & Palma 2013 — La lettera svelata di Lucrezia Borgia
- Original publication: You are not allowed to view links. Register or Login to view. (robots-blocked but real)
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## Companion / continuation material on the Lucrezia Borgia cipher
- Telestense article on the 2014 surfacing of Alfonso's reciprocal letter: You are not allowed to view links. Register or Login to view.
- La Nuova Ferrara (2015) on the bilateral cipher: You are not allowed to view links. Register or Login to view.
- CNR press release: You are not allowed to view links. Register or Login to view.
- La Storia Viva: You are not allowed to view links. Register or Login to view.
- Storiedipianura.it: You are not allowed to view links. Register or Login to view.
- "La parola incognita. Cifre e cifrari alla Corte estense": You are not allowed to view links. Register or Login to view.
- Lucrezia Borgia *Lettere* volume (PDF): You are not allowed to view links. Register or Login to view.
- Le scritture di Lucrezia (virtual exhibition): You are not allowed to view links. Register or Login to view.
## Vestigia research project
- Database: You are not allowed to view links. Register or Login to view. (Infocus query: You are not allowed to view links. Register or Login to view.)
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- Review of Vestigia III: You are not allowed to view links. Register or Login to view.
## Verbum journal (open access)
- Journal page: You are not allowed to view links. Register or Login to view.
- Somogyi author page on Academia.edu: You are not allowed to view links. Register or Login to view.
- Vol. 23 (2022) review by Somogyi: You are not allowed to view links. Register or Login to view.
## Vestigia 3 chapter index links (other chapters in same volume)
- Volume index: You are not allowed to view links. Register or Login to view. (Fideliter servanda) and You are not allowed to view links. Register or Login to view. (Vestigia 3)
Mark Knowles > 01-05-2026, 11:40 AM
(30-04-2026, 10:52 PM)Mark Knowles Wrote: You are not allowed to view links. Register or Login to view.I will look through your other references. Thanks.I haven't spotted anything of interest amongst these papers, though I could have missed something. They tend to be more focused on late 15th century ciphers it seems with an interest in Italian ciphers connected to Hungary(not surprisingly Judit Somogyi is Hungarian).