Today, after 38 days of mystery, the Park Slope Patch finally solved "Brooklyn's Stonehenge": the sweaters are the product of a 57-year-old lady who loves to knit but who's not that good, is bored of scarves, and doesn't have a dog.
“I knit as a hobby, and I was tired of making scarves,” Laurie Russell said. “I had knit one or two sweaters, but I’m not a very advanced knitter. I was looking at dogs, sausage dogs, and think about what a fun sweater shape that would be. But I don’t have a dog. So I started looking at trees as a simple ‘sweater.’”
She knits a new tree-sweater every year—the first, saffron-colored, was an homage to "The Gates"—putting them up in December and taking them down in the spring. They're very popular cuz, duh, it's Park Slope.