Mededelingen Waarde Lieftinck Waarde Lieftinck... De eerste briefwisseling tussen D.C. Geijskes en M.A. Lieftinck

The correspondence of both Dr. M.A. Lieftinck and Dr, D.C. Geijskes is kept in the archives of the National Museum of Natural History Naturalis at Leiden. Especially Lieftinck was an active correspondent with all odonatologists of that time. The correspondence between Geijskes and Lieftinck started as early as 1925, and consists of 72 letters and cards from Geijskes to Lieftinck, and 56 from Lieftinck to Geijskes. In the present paper examples from their first letters are provided, especially dealing with odonatological discoveries of Geijskes in the surroundings of his home at Berlicum, province of Noord Brabant.