sn't it about time for a few of those explanations?"

"If you think you can take it. How do you feel now?"

"Fine." I sat down on the couch again, leaning back and stretching out
my long legs comfortably. "What did you put in that drink?"

He chuckled. "Trade secret. Now; the easiest way to explain would be to
let you watch a film we made yesterday."

"To watch--" I stopped. "It's your time we're wasting."

He punched a button on the desk, spoke into a mouthpiece. "Surveillance?
Give us a monitor on--" he spoke a string of incomprehensible numbers,
while I lounged at ease on the couch. Forth waited for an answer, then
touched another button and steel louvers closed noiselessly over the
windows, blacking them out. I rose in sudden panic, then relaxed as the
room went dark. The darkness felt oddly more normal than the light, and
I leaned back and watched the flickers clear as one wall of the office
became a large visionscreen. Forth came and sat beside me on the leather
couch, but in the picture Forth was there, sitting at his desk, watching
another man, a stranger, walk into the office.

Like Forth, the newcomer wore a white coat with the caduceus emblems. I
disliked the man on sight. He was tall and lean and composed, with a
dour face set in thin lines. I guessed that he was somewhere in his
thirties. Dr.-Forth-in-the-film said, "Sit down, Doctor," and I drew a
long breath, overwhelmed by a curious, certain sensation.

_I have been here before. I have seen this happen before._

(And curiously formless I felt. I sat and watched, and I knew I was
watching, and sitting. But it was in that dreamlike fashion, where the
dreamer at once watches his visions and participates in them....)

* * * * *

"Sit down, Doctor," Forth said, "did you bring in the reports?"

Jay Allison carefully took the indicated seat, poised nervously on the
edge of the chair. He sat very straight, leaning forward only a little
to hand a thick folder of papers across the desk. Forth took it, but
didn't open it. "What do you think, Dr. Allison?"

"There is no possible room for doubt." Jay Allison spoke precisely, in a
rather high-pitched and emphatic tone. "It follows the statistical
pattern for all recorded attacks of 48-year fever ... by the way, sir,
haven't we any better name than that for this particular disease? The
term '48-year fever' connotes a fever of 48 years duration, rather than
a pandemic recurring