> If I recall correctly, one of your fiction-related newsletters mentioned navigation of sea vessels. I just got done reading MADHOUSE AT THE END OF THE EARTH, which is about a Belgian expedition to Antarctica, where the crew would often look for waterways (as opposed to impassable areas packed with ice) by looking for reflections of waterways in the cloud cover. — Forrest Perry via [email](https://mail.google.com/mail/u/0/#inbox/FMfcgzGmtrPlpMXxCBLHzdxfStHZnMJB). See: [[Madhouse at the End of the Earth by Julian Sancton]]