Moïse. “Yes, Sir. We remember.”
Spook. “Thought-reading at a distance requires conditions which are exactly the opposite of those necessary for clairvoyance. For clairvoyance you need a dry clear day, as in the case of KKK, and height helps. That is one reason why I was always doubtful if I could do all three clues here in Yozgad.”
Moïse. “Quite true.”
Spook. “I guessed if I got one lot I must fail with the other, as we had opposition. Now let me explain how thought-waves differ from wireless waves. First: direction. Moïse, which direction is best for wireless?”
Moïse. “I think it is East to West. I do not remember.”
Spook. “Wrong! Look it up!”
Moïse (referring to his book on wireless). “It is North to South.”
Spook. “Right! Now thought-waves have three bad directions and one good one. The good one is South to North. When travelling in that way the wave is at its strongest. Also, in wireless you have an immense number of radiating waves. In thought you have only one wave. Wireless waves radiate. Understand?”
Moïse. “Yes.”
Spook. “The single thought-wave goes like this—draw the motion of the glass.” (Note.—The glass moved in a left-hand spiral and Moïse drew a picture of a spiral.)