davidn has a habit of finding old notes he wrote to himself years ago and no longer having any clue whatsoever what in the world they mean or are talking about. Well, here's one for him!
I just found something very clearly and obviously in my handwriting on an index card right below some weaving notes (the weaving notes I recognize; that's not the issue.) It's rudimentary illustration of an eight-pointed asterisk (basically just lines going in the four directions and the four directions between those) with numbers at each direction. Clockwise from top:
This probably has something to do with weaving, but God only knows what.
Edit: This has now been solved. Someone in the comments figured it out. You will not believe what it turned out to be. I still can't believe he actually figured it out. How do you ... how does your mind work to be able to see things like that? I have weird friends.