The hilarious adventures of an elderly pony named Mr. Mendelson and his 2 piano-playing field mice friends In a wild, remote place called Midnight Park, there lives an elderly Orkney pony named Mr. Mendelson. He is only 3 feet tall, is black all over, and has a big, handsome head. For years, Mendelson has been ridden by Sam, who is now old enough to go away to boarding school. But before he leaves, Sam asks his grandfather to buy Mendelson a piano. Not for Mendelson, because everyone knows horses cant play the piano, but for Mendelsons friends Gertrude and Bertha2 talented field mice who were taught to play by a musician who lives in the park. Delighted when the piano is placed under a large oak tree, the mice promise Mendelson a concert at 6 p.m. every night.