Page 2 of a Letter from S. Dillon Ripley to Herbert S. Friedmann, December 13, 1943, Smithsonian Archives - History Div, Page 2 of a Letter from S. Dillon Ripley to US National Museum curator of birds Herbert S. Friedmann relates that he has asked Dr. P.E.P. Deraniyagala to do some further collecting in Southwest Ceylon of Dissemurus birds. He also writes that he heard by letter news of the killing of Hugh Birckhead, a close friend, in France..