It's Ibn Wahshiyya's Kitāb Shawq al-mustahām fī maʿrifat rumūz al-aqlām ("The Book of the Desire of the Maddened Lover for the Knowledge of Secret Scripts"), on hieroglyphics.

https://en.wikipedia.org/wiki/Ibn_Wahshiyya -- https://en.wikipedia.org/wiki/Decipherment_of_ancient_Egypti...