"Disappearing 4 patch - with a twist" tutorial by Janet of What Comes Next. *Note - there are measurements at the bottom of the post that show how to calculate your finished size.
June 14 Getchen. This block received its name, Gretchen, in the Kansas City Star in 1932. It has also been known as A Feather Bone Block (Kansas City Star, 1950) and Old Maid’s Quilt (Oklahoma Farmer Stockman, nd).