He checked her with an almost imperceptible gesture. "Could you tell me
about it from the beginning?"

Esther looked troubled. "I do not know much about the beginning. You
see, Aunt Amy is my step-mother's aunt, and I have only known her since
she came to live with us shortly after my father's second marriage. But
I know that she has been subject to delusions since she was a young
girl. She was to have been married and on the wedding day her lover
became ill with scarlet fever, a most malignant type. She also sickened
with it a little later; it killed him and left her mentally twisted--as
she is now. Her health is good and the--strangeness--is not very
noticeable. It has usually to do with unimportant things. She is
really," with a little burst of enthusiasm, "a Perfect Dear!"

The doctor smiled. "And the new development?"

"It is not exactly new. She has always had one delusion more serious
than the others. She believes that she has enemies somewhere who would
do her harm if they got the chance. She is quite vague as to who or what
they are. She refers to them as 'They.' Once, when she came to us first,
she was frightened of poison and, although my father, who had great
influence over her, seemed to cure her of any active fear, for years she
has persisted in a curious habit of drinking her coffee without setting
down the cup. The idea seemed to be that if she let it out of her hands
'They,' the mysterious persecutors, might avail themselves of the
opportunity to drug it. Does it sound too fantastic?"

"No. It is not unusual--a fairly common delusion, in fact. There is a
distinct type of brain trouble, one of whose symptoms is a conviction of