Here is how the portrait of Anne Hathaway was looking at the beginning of my session. As you can see, I have the reference photo, that I enlarged in the sketching stage, taped to the upper corner. The 4 x6 reference photo helps me to see sharp details. Most of these details are blurred in the larger photo that was printed. As always, my preference is to work from a color photo.
Here is the composition as it sits now. The mouth isn't exactly at the point that I would like it to be, but it is close enough for now. The graphite is photographing a little blotchy. The light source in the room isn't friendly to photos presently. When tweaking the original drawing, it is heaven sent to have the grid! :)