At open studio today I looked up from a sketch and noticed the focus and stamina of the artists.  A few sketches later I noticed it again and decided to try to capture it. So for the last pose I sketched the sketchers. I have to admire how hard they worked through the end of the three-hour session. It is interesting how the proportion of time split between looking at the model and looking at the sketch changes across the twenty-minute pose.  At first the three artists here hardly looked at their papers. Looking at this sketch now I wonder if I should have had all three artists looking up at the model. Would this have conveyed their focus a little more?  I used pencil and watercolor.