This is a different kind of magic circle. The right way up, it's designed to attract Lilith. Reverse it and the Hebrew forms a protective circle to keep Lilith out. The text is Isaiah 27:1 - "In that day the Lord with his sore and great and strong sword shall punish Leviathan, the piercing serpent; even Leviathan that crooked serpent; and he shall slay the dragon that is in the sea".
I finished the circle on Wednesday from a second shorn sheepskin and, after a little experimentation, figured out how to tie the strips to make the closed circle. I threw together a ceremony to invoke Lilith and ask her blessing on these two implements. Just a simple purification, consecration and banishing, followed by the invocation then a ritual of purifying them with water bought on the day and the hour of Jupiter.
So far, I haven't had a lot of success with the invocation. Could be because I'm dead-tired after 12 hour days at work. Could also be because I've had to take some shortcuts, (like purchasing the sheepskin rather than obtaining it directly from its owner!). If I did everything Tyson describes in the grimoire, it would be several months before I could start the work. This way, I'm figuring that I can at least get the process going, and go back to do the steps more thoroughly later on, (all the time hoping this isn't a recipe for disaster!)