Very confusing...you say it was hidden by building additions and yet discovered. But you can't really hide a 500 square foot cabin. So please explain or elaborate. Maybe it wasn't visible to the public, but it had to have been known by the property owner. Something here just doesn't make sense.
Walls were covered up with newer construction over and over and more rooms and doors and windows added to the building over time. My neighbor found very old wallpaper that had been covered up when they remodeled and in our home the fireplace was coverd up and we didn't know about it for a long time.
No, not 500 years old. The pioneers didn't come 500 years ago. What??! The year 1880 is 141 years ago. Granted that is a long time, but seriously the fact you heard 500 and still bought the idea... It is 500 square feet!!