And in my mind I made my own reply. I thought in deep concentration:
"_How do you read me, Psi-man?_"
The response was zero-zero. And it meant--nothing. My Psi-man could
have been following my every thought from the moment that my ringing
telephone summoned me to Gordon Andrews' apartment to the present
instant, so far as I could tell. There was no feeling of intrusion, no
feeling of _presence_.