Catherine Lampert is a historian, curator and model who spent much of her time sitting for her famous friends. She tells us what the likes of Auerbach, Lucian Freud and Euan Uglow meant to her Last November, a work titled Potiphar’s Wife by British painter Euan Uglow appeared in a private sale by Christie’s in London. “We were all so excited,” says art historian and curator Catherine Lampert. “I had tried many times to find out where that picture was.” It depicts a woman lying on the ground a...