Here is the lace maker, you first need to cut a small hole in the leather to start, I use it smooth side down as I find it works better. You pull the leather towards you until the blade cuts a little tail, you then grab the tail and pull that towards you and the let the leather spin on the back of hand while doing this. Thinner leather is a little trickier to get right but soon get the hang of it. There are different size cutting gaps to select. I used an off cut to demonstrate, for a good length a 5-7" square of leather is good.
(And the Celtic knot, I glued two thin slices of Holly back to back opposite grain, drilled holes and then sawed out with a coping saw and a little jewellery hand saw and shaped with a small chisel.)
Ruddy Darter.