Just Call Me Squiggle

I just wrote a postcard. I don't do much writing with a pen these days. And when I do I have to exercise iron control. If I just let rip I produce scribble- with words acquiring extra letters and most of the letters indistinguishable from one another- just a succession of peaks and troughs- like waves of the sea. If I try hard I can still be neat- but if concentration lapses I'm lost.

This is what my signature looks like...