From the Washington Township New Jersey Historical Society
A rather graphic version of a pattern published several times
as Square and Compass.
Ruby Short McKim's version from about 1930
There's some variation in how large the squares and the circles are in
proportion to the odd shape.
Portrait of Anna Westmire (1828-1916) and the quilt she made
in Miller, South Dakota.
A reporter wonders if Anna's pattern has to do with the Masons:
BlockBase will print you a pattern with a rather small circle (the compass) and a large square.
I was intrigued by the geometry of the square and circle.
What if you shaded....
But I see Marta at With Love From Marta Quilts has already considered that option
Stacy's Compass & Square