Joe F.: "Back in the '60s, when I worked in an editorial office, everybody who worked there had to have a recognizable squiggle for initialing the coversheets of manuscripts..."

I started out in the typesetting business in the early 70s as a proofreader. We'd initial each page as we completed proofreading, and I gradually developed a fairly consistent way to write "TH" in script without lifting pen from paper.

It started out as three separate marks: one simple downstroke as the upright part of the "T," then a second stroke representing the top of the "T" connected to the left-hand upright of the "H," and finally a flourish making the right side of the H and then a quick back-and-forth crossing the middle of the "H" horizontally. But as I did it more and more often, ever more quickly and semi-consciously, it morphed into a complicated but recognizable single-line scribble.

So, I don't need to select any existing design like a leaf or pentangle or Celtic cross, etc.