The joke is on them -- or me?

I snapped this photo of decorative attic vents during my recent stop at the Blue & Gray Museum in Fitzergerald, Ga.

The "colony" that later became the city drew hundreds of Union veterans and their family members in the 1890s.

Museum director Al Strom quipped that the top vent was placed in homes built for Yankee vets. If an old Rebel bought a home, he would place it upside down, as shown in the second vent. Hmmmm....