Attached is a picture of what I've done with the hanky edging so far. The thread is Mettler Machine Quilting Thread which is smaller than size 80 tatting cotton. I think it may be about a size 100. The edging is inspired (based on) Mary Konior's Beaded Braid. I started at what I felt was the most difficult part, the scalloped corner. Keep in mind that there will be one more round.
http://www.tribbler.com/tatman/, that finally began to get a dim glow of recognition. I had originally learned, though, to tat the split chain from right to left rather than left to right so I went back to Jane Eborall's original method instructions. I'm finally making something that looks like double stitches! I've got a lot of practice to do before this is comfortable which is my goal, but at least I've found the method that works best for me.
I hope those of you who are struggling with learning a technique will take heart from my story. Just because you can't seem to get it with one set of instructions, don't give up. Find another resource. There is more than one way to do many things in our craft and even more ways to explain them. Maybe I'll have a split chain project worth displaying tomorrow. Meanwhile, here are my practice pieces.
The split chain stitches in the candy canes look like double stitches from one side, but look awful on the other side. The unfinished split chain in the solid motif show the first good stitches I feel I've made. I'm going to try the Mary Maynard's candy cane again now that it is beginning to make sense.
Edit: I should have checked my mail before I posted. Georgia Seitz sent me a link to a split chain video by Linda Davies that is just what I needed. This looks the closest to the method I remember using before. Now to practice, practice, practice. Many thanks to Linda Davies for making and sharing the video, and to Georgia for sending it to me!