I am really enjoying working on this cloth. I regularly switch from looking at each square individually to looking at the rest of the cloth as it grows, just to make sure that the stitches hold everything together as a coherent whole.
Square 11 is made from one piece of fabric, layered over a foundation of lightweight calico. This is a fairly loose-weave muslin/cheesecloth, hand-dyed by a good friend who lives nearby and given to me as a gift. It seemed fairly obvious where the stitches were to go: