Illustrations by Claire Wyman | Story Edited by Brendan SpiegelIt’s a perfect summer day, one that brings tourists from the mainland to the small island of Pellworm off the German coast. Two women move across the grassy marshland. But they are so far away from Pellworm’s cafés and swimming spots that nobody would mistake them for tourists. Instead of bathing costumes, they wear their formal city clothes — long dark skirts, tight-fitting jackets,…