The taking up of experimental work produced a great change in my personal habits. I have told how already once in my life at Wimblehurst I had a period of discipline and continuous effort, and how, when I came to South Kensington, I became demoralised by the immense effect of London, by its innumerable imperative demands upon my attention and curiosity. And I parted with much of my personal pride when I gave up science for the development of Tono-Bungay. But my poverty kept me abstinent and my youthful romanticism kept me chaste until my married life was well under way. Then in all directions I relaxed. I did a large amount of work, but I never troubled to think whether it was my maximum nor whether the moods and indolences that came to me at times were avoidable things. With the coming of plenty I ate abundantly and foolishly, drank freely and followed my impulses more and more carelessly. I felt no reason why I should do anything else. Never at any point did I use myself to the edge of my capacity. The emotional crisis of my divorce did not produce any immediate change in these matters of personal discipline. I found some difficulty at first in concentrating my mind upon scientific work, it was so much more exacting than business, but I got over that difficulty by smoking. I became an inordinate cigar smoker; it gave me moods of profound depression, but I treated these usually by the homeopathic method,—by lighting another cigar. I didn’t realise at all how loose my moral and nervous fibre had become until I reached the practical side of my investigations and was face to face with the necessity of finding out just how it felt to use a glider and just what a man could do with one.