The Centre d’histoire de Sciences Po (Paris) is glad to welcome Ousmane Seydi as visiting PhD scholar. Mr. Seydi has obtained a Master’s degree at the Cheikh Anta Diop University of Dakar, where he has worked on the negotial definition of the colonial border between Senegal and Gambia (late 19th – early 20th c.) under the supervision of Prof. Ibrahima Thioub. Thanks to a Swiss Government Excellence Scholarship for Foreign Scholars he has recently joined the University of Basel. There he is now doing a PhD thesis, under the supervision of Prof. Patrick Harries, on the production and circulation of knowledge in the context of the Compagnie du Sénégal, focussing specifically on the French botanist Michel Adanson and his Senegal expedition (1748-1754). He will be staying in Paris for two months (January-February), working in different archives and libraries and taking part in the academic activities of the Centre d’histoire de Sciences Po.