In order to convince myself (says he) I was constantly on my guard, and Miss Cook readily assisted me in all my investigations. Every test that I have proposed she has at once agreed to submit to with the utmost willingness; she is open and straightforward in speech, and I have never seen anything approaching the slightest symptom of a wish to deceive. Indeed, I do not believe she could carry on a deception if she were to try, and if she did she would certainly be found out very quickly, for such a line of action is altogether foreign to her nature. And to imagine that an innocent school-girl of fifteen would be able to conceive and then successfully carry out for three years so gigantic an imposture as this, and in that time would submit to any test which might be imposed upon her, would bear the strictest scrutiny, would be willing to be searched at any time, either before or after a seance, and would meet with even better success in my own house than at that of her parents, knowing that she visited me with the express object of submitting to strict scientific tests--to imagine, I say, the Katie King of the last three years to be the result of imposture does more violence to one's reason and common sense than to believe her to be what she herself affirms. It will perhaps not be superfluous to round out these accounts of William Crookes by giving an extract from the journal _The Spiritualist_ of the 29th of May, 1874. From the beginning of the mediumship of Miss Cook, the spirit Katie King or Annie Morgan, who had produced the greater portion of the physical part of the manifestations, had announced that she would not be able to be with her medium longer than three years, and that after that time she would say good-bye to her forever. The end of that period came last Thursday; but before leaving her medium, she gave her friends three more seances. The last took place on Thursday, the 21st of May, 1874. Among the spectators was Prof. William Crookes. At 7.23 in the evening Professor Crookes led Miss Cook into the dark cabinet, where she lay down upon the floor, her head resting on a cushion. At 7.28 Katie spoke for the first time, and at 7.30 she showed herself outside of the curtain in her full form. She was dressed in white, short sleeves and bare neck. She had long light auburn hair of a rich tint, falling in curls on each side of her head and down her back to her waist. She wore a long white veil which was not drawn down over her face more than once or twice during the sitting.