40 minutes of furious mark making. Tough stuff. The mirror in the back helps the composition.
Five poses of five minutes each. All to make one image. The smallest was a try out for the long pose above. The work below has the same poses but all were held for 15 minutes.
Another composition using the same poses, this time in photoshop.
The first pose of the night. After the class I added the charcoal and cropped the work. The privates were well drawn; the legs less so.
Trevor Mill Graphic Designer Ltd 
Really great composition. Looks like it was a crowd of models.