A trace of the past in this narrow medieval street near the centre of Paris. This sketch took about 1 - 1/2 hours to do standing on the pavement opposite. I started by outlining the composition in faint pencil lines, and then set to work with the felt-tipped liner. The pencil can be rubbed out afterwards. I left certain areas white to increase contrast. Too much hatching and shading can overload a drawing and make it heavy. Economy of line should be aimed for wherever possible.