Sources

In In The Hesperian Islands, I referred to the original publications of the two juvenile Avalon stories, "Wingless" and "Rescue on Avalon." Then I corrected what I had written. Then I noticed a discrepancy.

I refer to:

Poul Anderson, The Earth Book Of Stormgate (Berkley Books, New York, 1979);

Poul Anderson, Rise Of The Terran Empire (Riverdale, NY, 2011).

In the Earth Book, p. v is "ACKNOWLEDGMENTS"; pp. ix-xii are "A CHRONOLOGY OF TECHNIC CIVILIZATION."

According to the Acknowledgments:

"Wingless" (as "Wingless on Avalon"), Children of Infinity, Roger Elwood, ed., Franklin Watts, 1973. Copyright 1973 by Franklin Watts, Inc.

"Rescue on Avalon," Boy's Life, July 1973. Copyright 1973 by The Boy Scouts of America.

According to the Chronology:

"Wingless on Avalon," Boy's Life, July, 1973.

"Rescue on Avalon," in Children of Infinity, ed. Roger Elwood, Franklin Watts, 1973.

Rise Of The Terran Empire:

includes both these stories;

presents "Acknowledgements" on p. V and "CHRONOLOGY OF TECHNIC CIVILIZATION COMPILED BY SANDRA MIESEL" on pp. 663-672;

reproduces the discrepancy.