For many of us, Norman Thelwell's illustrations are woven into the fabric of British life. Long before social media and smartphones, his wonderfully observed cartoons made us smile from bookshelves, kitchen walls, writing desks and mantelpieces. More than sixty years after his famous pony cartoons first appeared, Thelwell remains one of Britain's most recognisable and best loved cartoonists. There is something remarkable about artwork that can make us laugh decades after it was first drawn. Norman Thelwell possessed that rare gift. His cartoons were never simply jokes on paper. They captured people we recognised, situations we had all experienced and,...