With Carol's help I was able to design a corner motif that more or less goes with the rest of the pattern to be able to turn the corner on the tatted edging. The key pointers she gave me were
1. Keep the rings or stitch counts as consistent with the hens and chicks pattern
2. Add two tiny rings to help bridge the gap from the last hens and chicks motif to the corner motif, and from the corner motif to the first hens and chicks motif on the next edge
3. How much to leave for the bare thread gap will come instinctively. I didn't quite believe this at first, but sure enough, I found that I was able to intuit about how much thread I would need!
Hopefully next time I post, this little tablecloth will be gracing my tatting vignette at Keep Me In Stitches here in McCall!!! More on that later.
Have a wicked awesome day!