The fibre just flew onto the bobbin! I used my new slow speed bobbin and the thick bits turned out lovely and squishy if a little bit overly plumptious and the thin bits were, well, to be honest, rather too thin and twisty. I wasn’t sure how to set the yarn so just gave it a soak in hot water and swirled it around a bit hoping it might felt a bit. Picperfic (who sells somes very pretty fibre on http://www.etsy.com/shop/picperfic) suggested alternating between very hot and very cold water, so I will give that a go next time.
This is how the yarn ended up and how it looked when knitted. I started a hat, but it was a disaster because it was sunny, I was outside and not paying attention at all, so it got frogged!