Well through Christmas I didn't really get a chance to do studies. I contented myself with drawing in my pocket sized sketchbook whenever the opportunity raised but for the most part the previous two days weren't to great on the drawing side of things. I still managed to do my workouts but the amount of food I ate didn't help those endeavours.
Here is a skull study I did today. I spent about 2 hours on it and I'm sure I could have spent a great deal longer trying to workout how to match the texture, sutle shadows and highlights but time was short and I have a great deal of work to do this week.