Etty Darwin and the Four Pebble Problem

"A gorgeous rumination on belief and imagination featuring Henrietta (Etty) Darwin and her famous father, Charles. Etty went on to become a valued and keen editor of Charles's work and a thoughtful and intellectual being in her own right. This imagined conversation between Etty and Charles as they stroll around Charles's real-life "thinking track" explores their close relationship and shows that even science is nothing without an open mind and imagination"--