In 1850, young Scottish plant hunter John Jeffrey was despatched by an elite group of Victorian subscribers to seek highly prized exotic trees in North America. An early letter home told of a 1,200-mile transcontinental journey by small boat and on foot. Later, tantalising collections of seeds and plants arrived from British Columbia, Oregon and California, yet early promise soon withered. Four years after setting out, John Jeffrey, and his journals, disappeared without a trace. Was he lost to love, violence or the Gold Rush? Green Gold combines meticulous research with the fictional narrative of Jeffrey's lost journals, revealing an extraordinary adventure.