gravity, as being the one great force which controls my universe. And yet, on second thoughts, I must modify myself. This great force of gravity is not always in the saddle. Sometimes it just is not there — and I lean strangely against a wall. I have been even known to turn upside down, with my wheels in the air; spun by the same mysterious Miss. So that I must introduce a theory of Relativity. However, mostly, when I am awake and alive, she is in the saddle; or it is in the saddle, the mysterious force. And when it is in the saddle, then two subsidiary forces plunge and claw upon my two pedals, plunge and claw with inestimable power. And at the same time, a kind and mysterious force sways my head-stock, sways most incalculably, and governs my whole motion. This force is not a driving force, but a subtle directing force, beneath whose grip my bright