Indeed, the author of "Star Harvest" tablerunner in the Quiltmaker Magazine (July/Aug 2010) has listed that she used "Barbara Brackman's Encyclopedia of Pieced Quilt Patterns - this block is a variation of the Double Windmill."
Quoted from the upper right corner of pg 63.
Originally Posted by Log Cabin Quilter
I found a block in Barbara Brackman's Encylopedia of Pieced Quilt Patterns called Double Windmill. It is under listing #4204. Looks like it is the same one.