Seabrook's theory: witchcraft (black magic) is potent, can kill by autosuggestion, just as psychotherapy (white magic) can rid folk of fancy-induced but very real ills.
His friends explained it was because he had been kept from doing his yatayoga (breath-control and autosuggestion exercises) by swarms of visitors at his house.
The reappearance of these hairs after the grafting operation certainly cannot be ascribed to autosuggestion, to which certain critics have ascribed other phenomena that follow .