MS 9061 comprises mainly correspondence, research material and drafts relating to the compilation of Duyker's publications. There are papers relating to Duyker's research into the history of Mauritius and his involvement in Mauritian family history research, including correspondence with genealogists. There is a copy of Gaston Sarre's Recueil de reseignements sur les familles de Lile Maurice, 1945, containing genealogical notes on 3000 Mauritian families. There is also correspondence between Bell, Regnard Co., Melbourne, and Pipon, Bell Co., Mauritius (1853-1855), concerning the importation of Mauritian sugar. A copy of Duyker's PhD thesis Tribal guerillas : the Santals of West Bengal and the Naxalite movement and associated research material is also included (19 boxes, 2 fol. boxes).