I'm pleased with progress on this one as it's a technique I've never tried before. I attended a workshop in June with Clive Meredith (www.artofclivemeredith.blogspot.com) and was very inspired by his use of layering different grades of graphite pencil to get a truly lifelike depth. This is my effort so far and is probably about 15 hours' work by now (it is A3!)