These two bookmarks are inspired by Mary Konior's "Corn and Chaff," from her book Tatting in Lace.
Ever since tatting Corn and Chaff, I wondered how Mary was able to make these braid patterns. I finally figured out a way to do it, but find it easier to work with larger ring sets of three and four. It's basically a matter of balancing the curvature of the large ring, with the arch created at the base of a ring set. There's some trial and error in getting things to fit snugly.
Some interesting shapes can be made with these one shuttle patterns. Here's a version with pairs of rings: