Photo: Courteous Cats
I noticed this before we went to San Antonio for Christmas and thought Mr. L had done it to protect the curtains from cats getting into and out of the window.
Yesterday, Mr. L asked if I did it. I guess the cats did it. (We have an alcove in our entry hall just large enough for an Eastlake walnut loveseat. When we bought this house, we had all the furniture for it already. My mom made these curtains for us shortly after we moved in.)