The Doctor never did believe this story, but claims for it that, to a great extent, it has altered his whole outlook on life.
"Of course, what actually happened--what took place under my own nose," continued the Doctor, "I do not dispute. And then there is the case of Mrs. Marigold. That was unfortunate, I admit, and still is, especially for Marigold. But, standing by itself, it proves nothing. These fluffy, giggling women--as often as not it is a mere shell that they shed with their first youth--one never knows what is underneath. With regard to the others, the whole thing rests upon a simple scientific basis. The idea was 'in the air,' as we say--a passing brain-wave. And when it had worked itself out there was an end of it. As for all this Jack-and-the-Beanstalk tomfoolery--"
There came from the darkening uplands the sound of a lost soul. It rose and fell and died away.