The current (new) project on the needles is the Grand Tour Waistcoat (pattern designed by Di Gilpin) from the book
Folk Style, by Mags Kandis, Interweave Press, 2007. After counting the finished yardage and looking through my library, the vest stood out and having knitted a gauge swatch I knew it was the perfect pattern for the yarn. Digging through the handspan stash I found the dark brown yarn, although I know it's wool, the type is a mystery.
The yarns are two-ply, z-spun and s-plied, approximately 9 WPI (wraps per inch). The gauge worked well with a 4.5 mm/US 7 knitting needle for the heavy worsted to Aran weight yarns. (I used The Standard Yarn Weight System Handy Chart from Spinderella's Fiber Mill.)