Ground Sea is Hilde Van Gelder’s website. On its pages you can learn more about Hilde’s book project, Ground Sea. Once upon a time, Hilde started to send letters to Othillia G——. They arrive accompanied by documents and objects. From her home in De Blinkerd aan Zee, Othillia G—— replies to Hilde. Othillia also writes letters and postcards to others, who sometimes respond. Somewhere in between these activities, you may discover wandering postings (zwerfpost).