Historically significant cars resurface all the time—found in barns, fields, subterranean caverns, even behind brick walls—quite often making news when they do. After all, their continued existence either confirms or denies decades’ worth of speculation about their continued existence and fills in those gaps in the historical record, of which there are plenty.

It’s for that reason that we automotive journalists tend to hedge our language when discussing cars that haven’t been seen for awhile. They’re often described as “missing,” “lost,” or “vanished,” vague words that simply mean we don’t have a royal clue as to their whereabouts, oftentimes because they’ve been squirreled away, because insufficient documentation of their fates exist, or because intrepid car hunters just haven’t turned over the right rock yet.

The Norseman and the Snow Cruiser are just two vehicles that will never been seen again.