THE profession of medicine has a good many drawbacks in the way of interrupted meals, disturbed nights and long and strenuous working hours. But it has its compensations, for a doctor's life is seldom a dull life. Compared, for instance, with that of a civil servant or a bank official, it abounds in variety of experience and surroundings, to say nothing of the intrinsic interest of the work in its professional aspects. And then it may happen at any moment that the medical practitioner's duties may lead him into the very heart of a drama or a tragedy or bring him into intimate contact with crime.Not that the incident which I am about to describe was, in the first place, directly connected with my professional duties. The initial experience might have befallen anyone. But it was my medical status that enlarged and completed that experience.It was about nine o'clock on a warm September night that I was cycling at an easy pace along a by-road towards the town, or village, of Newingstead, in which I was temporarily domiciled as the locum-tenens of a certain Dr. Wilson. I had been out on an emergency call to a small village about three miles distant and had taken my bicycle instead of the car for the sake of the exercise; and having ridden out at the speed that the occasion seemed to demand, was now making a leisurely return, enjoying the peaceful quiet of the by-way and even finding the darkness restful with a good headlight to show the way and a rear light to secure me from collisions from behind.