Sure I doodle on old envelopes, documents and newspapers, but my doodles consist of shaded cubes and poorly drawn body parts. Not those of artist Mark Powell, however. Like the work of Spanish artist Juan Francisco Casas, Mark uses a Bic Biro pen to draw and shade realistic portraits. His canvases are various vintage envelopes, maps and newspapers dating back to 1819. While some blogs have featured his envelope drawings, here's a look at 15 of his more recent pieces, courtesy of his Facebook…
