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Using the Mysteron pulsator recovered from the complex in Crater 101, Dr Kurnitz has developed a transmission device with which Colonel White attempts to contact the Mysterons and sue for peace.
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[replying to Colonel White's message
This is the voice of the Mysterons. Your message has been analysed and it has been decided to allow one member of Spectrum to meet our representative. If you agree you must carry out the following instructions. Any deviation and the arrangement will be cancelled. The member of Spectrum must not carry and weapons or communication equipment of any kind. He will fly on a course of one-two-four magnetic from Cloudbase's present position. Further instructions ...