Portraits on Envelopes by Mark Powell© Most people keep to traditional way of viewing things, but there are unique people, who have an alternative way of thinking. Mark Powell had discovered another application for old envelopes. The artist uses them as canvas for his drawings. Remarkable fact is that he sketches portraits of elderly, birds, buildings and other scenes with Bic Biro Pen. As Mark Powell lives and works in London some of his drawings depict sights of the city.