Germany wasn't big enough to have both [Erwin] Stresemann and me, and Stresemann was there first. He occupied the territory, and I'm quite sure that in due time I would have had to… shift into something very different which I could have possibly done, or get into continuous fighting with Stresemann. Now Stresemann was… in one respect he differed from me and I've just been discussing this with a man who's working on a Stresemann biography. Stresemann was outstanding, I have nothing but admiration for Stresemann, but he always was… he… he applied everything to birds, he never stepped outside; I always had interests outside of birds. In the course of my life I have worked on groups of insects, I have worked on marine invertebrates, I have worked even on plants and so forth. That never would have happened in Stresemann and I'm quite sure that if I had stayed in Germany I probably would in… in… very soon shifted to some other group of organisms.