Some brownstone owner in Carroll Gardens apparently feels they need an extra set of windows. And so they installed a row of three small sliding openings in the cornice of their home. They look like those little open-and-shut peepholes you see on speakeasy doors in the movies. Could some sort of espionage work be going on up there? A police sting operation aimed at the brownstone across the street? Is an unwanted, possibly crazy relative locked up there, "Jane Eyre"-like.
The same style is in evidence in the brownstone next door. Strange.