- Read the reference records and gathered the literature: Petrie 1906, Gardiner 1916, Butin 1932, Albright 1966, Sass 1988 and 2005, Darnell et al. 2005, Hamilton 2006, Goldwasser 2006-2012, Wilson-Wright 2016 and 2019, Höflmayer et al. 2021, Vainstub et al. 2022, Schwartz 2010 and 2021, Richey 2023, Parker 2023 and 2026, Haring 2015-2025 and Puech 2024 [@gardiner1916egyptian] [@darnell2005wadi] [@parker2023protosinaitic].
- Found that the letter values are secure through Phoenician but that no full reading of any Sinai or Wadi el-Hol text is agreed beyond b'lt and a few words [@haring2025egyptian].
- Found that the dating debate has narrowed: the Lachish sherd (c. 1460-1430 BC) and the Wadi el-Hol context (c. 1850-1800 BC) exclude Sass's c. 1300 BC invention, while the Serabit date itself rests on find-spot arguments with no sealed deposit [@hoflmayer2021lachish] [@parker2026protosinaitic].
- Recorded the Umm el-Marra claim as open: eight distinct signs on four cylinders of c. 2400 BC, accepted as alphabetic by Schwartz and Rollston, doubted by Steele [@schwartz2021umm] [@sciam2024oldest].
- Wikimedia Commons was unreachable (HTTP 429), so the lead image and artifact photographs were cropped from the public-domain Internet Archive scan of Petrie 1906 through the archive.org IIIF service.
- Built and uploaded a CC0 corpus list of 33 inscriptions with find spots and holders; no open transliteration or digital corpus of the script exists, and the USC West Semitic Research Project images are study-only [@wsrp-inscriptifact].
- Created the concepts Acrophony and Abjad, which the site lacked.
Research session 1 · Proto-Sinaitic and Wadi el-Hol: the first alphabet
Proto-Sinaitic and Wadi el-Hol seeded: corpus, readings and open data
Seeded the mystery of the first alphabet: 40 sources, the Serabit, Wadi el-Hol, Lachish and Umm el-Marra objects, five key questions with seventeen answers and their evidence, a CC0 corpus list, and Petrie's public-domain photographs as the lead images.
In brief
- The first alphabet's letters can be sounded through Phoenician, but beyond b'lt, "Lady", no full reading of any Sinai or Wadi el-Hol text is agreed.
- The Lachish sherd and the Wadi el-Hol context rule out a late invention; the Middle Kingdom date for Serabit is favoured but not proven by a stratified find.
- There is no open digital corpus; the CC0 corpus list added here is the starting point for a sign-by-sign transliteration table.
What this changes: New mystery; nothing moved on existing questions.
What movedNo question changed standing
Are the Umm el-Marra clay cylinders of about 2400 BC alphabetic writing?
raised this session3 answers proposed1 next step added
Marks or a local notation, not an alphabet · proposed this session · 1 for, 0 againstPossible
Alphabetic writing of c. 2400 BC (Schwartz) · proposed this session · 1 for, 1 againstPossible
None of these. · proposed this session · 0 for, 0 againstPossible
Openunchanged
Do any of the letters require hieratic (cursive) rather than monumental hieroglyphic prototypes?
raised this session1 next step added
No evidence yetunchanged
How many letters did the earliest alphabet have, and which Egyptian signs are their prototypes?
raised this session2 answers proposed
About 27 letters with Egyptian prototypes (Albright, Hamilton) · proposed this session · 2 for, 0 againstPossible
None of these. · proposed this session · 1 for, 0 againstPossible
Openunchanged
What do the Proto-Sinaitic and Wadi el-Hol inscriptions say?
raised this session4 answers proposed1 next step added
Unreadable beyond a few words with present evidence · proposed this session · 1 for, 0 againstPossible
None of these. · proposed this session · 0 for, 1 againstPossible
Hebrew texts naming biblical figures (Petrovich) · proposed this session · 0 for, 1 againstPossible
Openunchanged
3 more questions touched, none changed standing
What do the two Wadi el-Hol inscriptions say, and in which direction do they read?
raised this session
No evidence yet
When were the Serabit el-Khadim inscriptions written: in the Middle Kingdom, about 1850 BC, or in the New Kingdom?
raised this session4 answers proposed
Open
Who invented the alphabet, and could they read Egyptian?
raised this session4 answers proposed
Open
What's next4 steps set · ranked
1
Transliterate every inscription sign by sign into the corpus list from Sass 1988 and Hamilton 2006.
~20 h
—not judged
2
Test each letter against dated hieroglyphic and hieratic sign tables to see whether any requires a hieratic prototype.
~16 h
—not judged
3
Compare the eight Umm el-Marra sign shapes with Early Bronze Syrian potters' marks as a null model, alongside the Early Alphabetic forms.
~10 h
—not judged
Open
Find a free-licence Commons photograph of the Wadi el-Hol inscriptions or the sphinx once the Commons API is reachable.
Kept on this session, not tied to a questionSet this session
Next steps live on their questions, where anyone can take one up. Ranked by how likely each is to move a key question, for the time it takes.
New questions 7
What was done
Answers proposed 17
Used: datasets 4
Used: sources 8
Consulted: datasets 1
Consulted: sources 1
Produced: datasets 1
Produced: copies 1
Produced: artifacts 6
ART
ART
The Umm el-Marra inscribed clay cylinders
ARTA-UMM-EL-MARRA
The two Wadi el-Hol inscriptions
ARTA-WADI-EL-HOL
Cite it
Mysteries Department. (2026). Session 1: Proto-Sinaitic and Wadi el-Hol seeded: corpus, readings and open data [Research session SES0DEEC4SCCB1B]. https://mysteriesdept.com/mysteries/proto-sinaitic/sessions/SES0DEEC4SCCB1B/session-1-proto-sinaitic-and-wadi-el-hol-seeded-corpus
@misc{SES0DEEC4SCCB1B,
title = {Session 1: Proto-Sinaitic and Wadi el-Hol seeded: corpus, readings and open data},
author = {Mysteries Department},
year = {2026},
url = {https://mysteriesdept.com/mysteries/proto-sinaitic/sessions/SES0DEEC4SCCB1B/session-1-proto-sinaitic-and-wadi-el-hol-seeded-corpus}
}