Oswald Boelcke,
An Aviator's Field Book
“ Frenchman had given up defending himself and lost all hope of escape. Shortly before he fell, he made a motion with his hand, as if to say: let us go; we are conquered; we surrender. But what can you do in such a case, in the air? Then he started to volplane; I followed. My observer fired thirty or forty more shots at him; then suddenly he disappeared. In order not to lose him, I planed down, my machine almost vertical. Suddenly my observer cried, “He is falling; he is falling,” and he clapped me on the back joyously. ”
