Here’s a globe of Ynys Afallon, where the Ship’s Fox story takes place. Ynys Afallon has many portal connections with Earth, but generally only “magic” or extreme electromagnetic events can activate them. Humans have been present here for thousands of years, and other Earth species much longer, but life has only been possible on Afallon for the past few million years. Before that the planet was in a different orbit, and too cold to have liquid water. It does not possess any coal or oil deposits.