1799 Pierre-François Xavier Bouchard, officer in the French Army of engineers, discovered the during some repair work on Fort Julien. The official declaration of the discovery appeared in the "Courrier de l'Égypte", on September 15, 1799.

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(or 19th July) 1799 Pierre-François Xavier Bouchard, officer in the French Army of engineers, discovered the during some repair work on Fort Julien. Bouchard was immediately convinced of the importance of his discovery. 1/

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