On a snowy day in London, as he was lying in bed and gazing at the ceiling, Sherlock Holmes’ mind was once again at work trying to crack yet another case. It wasn’t long before Dr. Watson knocked at the door and described a most peculiar murder case. Sherlock, at first, paid no attention to any of what Watson had to say. However, when Watson told him of the tracks from the bicycle with which the culprit had made his getaway, Sherlock suddenly turned to him and said, “well, now, why don’t we have a look at those tracks?” When they arrived at the scene, there was a smile on Sherlock’s face. That was because he, too, could not figure out where the tracks were leading.
Even once everybody had retreated to their homes due to the bitter cold, Sherlock was still intensely trying to figure out where the odd tracks led. There were two different types of tracks belonging to two types of tires; one must have belonged to the front tire and the other to the rear. He then realized he needed to figure out which kind of track belonged to which one of the tires to discern the culprit’s direction.
