2nd entry for Sept 21, 2015

These are two 10-minute studies above, a 15-minute one and a 20-minute one. The top two are grey and black pigment pen on 18 x 24" sheets of Canson Recycled Sketch paper.
The lower two are black Pitt pen, graphite and Progresso woodless pencil for shading. Later I went over the bottom one with a Prismacolor clear blender pencil to smooth out the shading texture. These are both on 18 x 24" sheets of lightweight Stonehenge paper.