kind, in others it is sometimes duller; and they are known to scientists as 'hystericals.'
"Now, when you gave me your account, Dr. Pierce, of what had happened here last Wednesday, it was evident to me at once that, if any of the persons in the house had admitted the visitor who rang the bell—and this seemed highly probable because the bell rang only once, and would have been rung again if the visitor had not been admitted—the door could only have been opened by Miss Iris. For we have evidence that neither the cook nor Ulame answered the bell; and moreover, all of those in the house, except Miss Iris, had stood together at the top of the stairs and listened to the screams from below.
"Following you into the study, then, I found plain evidence, as I pointed out to you at the time, that two persons had been there, one a man; one perfectly familiar with the premises, the other wholly unfamiliar with them. I had also evidence, from the smoke in the museum, that the study door had been open after the papers were lighted, and I saw that whoever came out of the study could have gone up the anteroom stairs to the second floor of the south wing, but could not have passed out through the main hall without being seen by those listening at the top of the stairway. All these physical facts, therefore, if uncontradicted by stronger evidence, made it an almost inevitable conclusion that Miss Iris had been in the study."
"Yes, yes!" Pierce agreed, impatiently, "if you arrange them in that order!"
"In contradiction of this conclusion," Trant went
