Illicit trade with China is fuelling  insurgency in Mozambique's Cabo Delgado province. The endangered material is wild rosewood which, in value, outprices trade in rhino horn and ivory; Senegal has bought back from France the library of their poet Presifent Léopold Sengor. The book will go on display in s museum on Senghor's life. Jean-Jacques Cornish speaks to Africa Melane.