From time to time, my friend AzorÍn attempts to analyse my ideas. I do not pretend to be in the secret of the scales, as such an assumption upon my part would be ridiculous. As the pilot takes advantage of a favourable wind, and if it does not blow, of one that is unfavourable, I do the same. The meteorologist is able to tell with mathematical accuracy in his laboratory, after a glance at his instruments, not only the direction of the prevailing wind, but the atmospheric pressure and the degree of humidity as well. I am able only, however, to say with the pilot: "I sail this way," and then make head as best I may.