It has come to my attention that the abbreviation for place bead (pb) has been omitted from the Mystery Blanket patterns. We are going to add it to the remaining instalments from August to November. But in the meantime, here it is:
pb place bead (on right-side and wrong side rows): with yarn on the right side of the work, slide a bead up the yarn, slip the next stitch purlwise, then if necessary bring the yarn between the needles to work the next stitch, leaving the bead at the front of the work
I apologise for this oversight and hope that it has not affected the enjoyment of your Mystery Blanket knitting.