The President : I am sure we all agree that we have listened to a most in? teresting and, indeed, fascinating lecture from Dr. St. Joseph. It opens up all sorts of vistas for the future. One can see aerial photography extending far beyond these islands, far beyond our own Continent. I can see it over the vast forests of Brazil and all that country of which we know nothing but about which much will be revealed to us. In the same way as the barrows and camps in our small field have been revealed, so the ancient buildings and remains will be revealed, I am convinced, by aerial photography of the forests that lies below the Andes. However that is a development for the future. Meanwhile, I am confident that the Air Ministry is as conscious as we are of this for the moment secondary product of its activities, and I have every confidence that when the war is over we shall be able to call on that Ministry for help in preserving and developing those features which we have had so pleasantly and instructively put before us. I am sure that I speak for you all when I convey our very best thanks to Dr. St. Joseph for his lecture.