A sliver of Jacob, reclining against the cave wall. The light is meant to reveal. Or scan? Jacob shivers, remembering for only a split second his only experience in the Human Scanner, back at the Human Hospital, where they looked all through him for nodes or clumps of history, and found only liquids and healthy softs, transparent in the radiogrammatic moonlight of the computer image.     All this tired me. I slept in a dark corner, like a bee.