Avalonography

Poul Anderson, "The Problem of Pain" IN Anderson, The Van Rijn Method (Riverdale, NY, December 2009), pp. 103-134.

Where better to look for Avalonography than in the story which introduces the planet and in which it is explored by Ythrians employing an Aenean human couple?

Hloch introduces an unnamed first person human narrator whose own introduction and conclusion frame a third person account of Peter Berg's experience on the as yet unnamed planet, Avalon. This terrestroid planet, smaller than Earth, larger than Ythri, might be colonized by either species or both. (The first Ythrian story, "Wings of Victory," was published in 1972; the rest, including this one, in 1973. Anderson clearly worked on them together.)

A spaceship, which could not be spared to stay in orbit, left about a hundred beings who made their base on the largest continent, then dispersed across the planet. A strong current flowed east from a great gulf on the southern shore of the continent and was deflected north by an archipelago.

The largest continent = Corona.

The great gulf = the Gulf of Centaurs.

The archipelago = Oronesia.

An Ythrian family and a human couple sail out to explore a floating island of atlantis weed. The unexpectedly violent weather shipwrecks them on (what I think is) one of the Oronesian islands.