 History can claim to be mistress of science, as much as mathematics, though in a different sense. They stand for the two vital elements in every science which cannot be separated, if they can be considered separately, the constructive process by which we discover by our thought the order inherent in things, and the raw material itself… It must be remembered, however, of course, that historical science is but one of the sciences which arise from the facts and happenings of the world. (Alexander 1936: 24)