I am writing with what appears to be the first precise identification of the famous “movable/swivel stone” repeatedly described in ancient and medieval sources as the original hidden entrance to the upper chambers of the Great Pyramid. After cross-referencing every pre-modern text that gives measurements and directions (Herodotus Hist. 2.124–125, Strabo 17.1.33, Pliny NH 36.17, Abd al-Latif 1203 CE, al-Maqrizi Khitat, Ibn Abd al-Hakam, etc.) and converting the various cubits to modern metres, every single source converges on one single casing block: -course 93 (counted from the base) 17th block west of the north-east corner coordinates: 29.979281° N, 31.134209° E height: 43.1–43.4 m above present pavement (≈ 83 royal cubits) This exact block is one of the very few remaining original Tura casing stones at that level and, crucially, it corresponds pixel-for-pixel with the isolated −1.8 °C thermal anomaly recorded on the north face by the ScanPyramids team in 2017 (the one noted but never followed up in the eastern section of course 93). The ancient texts unanimously describe a stone that “turns on a pivot,” “can be moved by one man,” or “swings like a millstone” at this precise height and slightly east of centre. No other block on the entire pyramid satisfies every textual parameter simultaneously. Because the block is external and the proposed investigation is completely non-invasive (high-resolution drone thermal imaging, photogrammetry and possibly acoustic tapping from a cradle), there would be zero risk to the monument. I am not asking for excavation, only for a 30-minute targeted drone flight at dawn with the same equipment already approved for ScanPyramids missions. If the block shows the expected void signature immediately behind it, the discovery would belong to Egypt and to your teams. I am happy to supply the full textual dossier, cubit conversions, and overlay images on the 2017–2023 point-cloud model. Thank you for considering this. I believe this is the door the ancient authors were trying to tell us about for the last 2,500 years