The watercolour illustration for the first edition of JK Rowling’s Harry Potter and the Philosopher’s Stone has become the most valuable Harry Potter item ever sold. It made $1.9 million at Sotheby’s sale of the library of Dr. Rodney P. Swantko in New York after a four way bidding battle. It had been estimated at $400,000 and $600,000 – the highest pre-sale estimate for a Harry Potter-related work.
The artist Thomas Taylor used concentrated watercolours with black pencil outlines. He was only 23 in 1997 when he made the iconic image of Harry Potter standing in front of the Hogwarts Express and it took him two days.