Today, I was thrilled to receive my first edition copy of Of Coverlets the Legacies, the Weavers. I am having trouble reading the drafts. On page 33 there is a two block draft that I have been trying to decipher. If I am reading it correctly Block A (the right hand block) should be threaded (1, 2,2,2,2) X 10, 1. What I am really have trouble understanding is the symbols beneath the threading. They read, II S (21U). It is my understanding that that the II indicates a two shaft pattern. The S according to the key indicates Sequence. What does this mean? That it is to be treadled as drawn in? Does the (21U) mean that the block should be treadled 21 times star fashion? Any clarification, would be greatly appreciated. By the way, I highly recommend the book :)