Remember...

Series characters can reminisce either about earlier episodes or about adventures remembered by them but not by us. A Nomad recalls:

"'The flying city on Aesgil IV, and the war between the birds and the centauroids.'"
-Poul Anderson, The Peregrine (New York, 1979), Chapter XIX, p. 164.

Maybe we can read about this flying city in a previous episode? No, all that we find earlier in the Psychotechnic History is the founders of the Nomads remembering that:

"We had ridden centauroids who conversed with us as they went to the aerial city of their winged enemies -"
-Poul Anderson, "Gypsy" IN Anderson, Starship (New York, 1982), pp. 12-34 AT p. 29.

This is a slightly different description:

an "aerial" city might hover rather than fly;
"winged" antagonist might not be birds.

I am grateful for these two differently worded accounts.

Thus, Aesgil IV was visited at least twice, first by the lost Traveler, then later by a Nomad ship, the Peregrine. Aesgil IV must be the fourth planet of a fictional star called "Aesgil."

We are intrigued by this war between centaurs and sky-dwelling fliers. I thought that there might have been a corresponding Greek myth. Certainly centaurs fought. No matter how much Anderson wrote, some of his characters were going to recall adventures that we have not been able to read about. Nevertheless, we thank the Muses and the author himself for the extent of Anderson's works.