A young lad dressed in a cap and pointed slippers sits hunched over a sheet of paper at work on a drawing ... of the media – including pen-and-ink and metalpoint – that, between 1450 and ...

An 18th-century pen-and-ink sketch by English portraitist George Romney was hidden amid the rubbish. “When I first found it buried in the dumpster, it looked interesting but I had no idea it ...