The stitch is called Laced Wheel Stitch and I found it at badasscrsossstitch.
Work it like this:
Make a large Cross Stitch
Make a double Upright Cross Stitch
on top.
Change to another thread
and come out under one of the
previous threads.
Weave over the double Upright Cross
and under the standard Cross Stitch.
One time 'round the park',
or as many as you like.
Anchor underneath the laced thread.
Homework:
Well you know, the same three old samplers as usual: