Inspired by some of the booklets at antiquepatternlibrary.org, I did a simple, filet edging on a 12" linen handkerchief. I've never considered finishing an edge with single crochet. Turns out it works quit well. I used size 10 crochet cotton, which I realize now is much to heavy for the lightweight linen. Next time I'll try embroidery floss. This was fun and worked up in just a couple hours, the hardest part was getting the single crochets even.