original spoor and so found his starting-point. But it was quite evident that no one could have found the nest by his sense of locality alone.
A boy of fourteen, born on the Flats and known to possess a high sense of locality, was then tested in the same manner. In three trials he never succeeded in getting near the correct locality. He was then hypnotised at the nest and led a long distance away while every device was adopted to obliterate his sense of direction. About a mile from the nest he was stopped and told to go back. He unhesitatingly did so in a perfectly straight line. It was ascertained that his ability to find the nest was not in any way affected by the distance he was taken away, nor by the nature of the route. Even where a series of circles were described, and numberless zigzags and angled courses, he was never in the least doubt as to the exact direction in which the nest lay. When he was led away blindfolded and the same methods of mystification were adopted, the moment his eyes were opened he invariably turned and walked in the right direction. If, however, he was led away blindfolded even a short distance and told to find the nest still blindfolded, he not only could not do it but as often as not walked directly away from it. And the same result followed if he was led away open-eyed for a short distance and then told to go back blindfolded.
It is evident, therefore, that in the hypnotised boy qualitatively the same incomprehensible faculty of location became functional under hypnosis as existed in the mother bird.
Another interesting fact that became apparent was the evident influence which sight exercises on the operation of the faculty. Trained pigeons if temporarily blinded cannot ‘home’. They can find their way back on fairly dark nights, but if the night is very dark they become confused and lose their sense of direction.
But the sense of locality is certainly not just a mere ‘matter of seeing’. It will be remembered that in the cases mentioned the subject ‘homed’ in a direction which led through localities never before seen. The ‘homing’ pigeon does this habitually. It is usually placed in a basket and carried inside a closed vehicle for great distances and returns by a direct route. Under such conditions there can be no ‘sight memory’ to guide it.
An explanation that suggests itself is this: Every movement through space, every turning of the body on its axis, is registered in the ‘subconscious’ mentality. So that the animal at the end of the journey, even when it has been shut up in a box, bears within itself a complete psychic chart of the route traversed. But, while initially this seems the only psychological theory, there are difficulties in the way. It cannot account for homing by a route different to the one traversed. In the case of the boy mentioned in Chapter 3, for instance, it is difficult to imagine how a complete psychic chart of a single line could confer all the benefits of a mathematically accurate geographic map.