Onlangs ontvingen wij een brief van de heer C. (Carl) Cook, uit de Verenigde Staten, waarin hij verzocht om uitwisseling van informatie en materiaal met odonatologen buiten de Verenigde Staten. Omwille van de volledigheid reproduceren wij hierbij het relevante deel van zijn brief letterlijk. I would very much appreciate it if you could publish a short notice in your newsletter to indicate my interest and desire to correspond with other Odonata devotees all over the world. I have an extensive list of world species to offer in exchange, and also will exchange literature concerning Odonata. I am currently doing revisional studies on several groups, in particular the world species of the family Gomphidae, and all families of the South-east Asian fauna with special emphasis on the species of the Philippines. I solicit material of the above groups to examine and specimens to identify.