In the 1880s, UC Davis professor Eugene Hilgard planted clone 6, which is also called the Jackson clone, at the university's field station at Jackson in the Sierra Foothills. It was abandoned until the last few decades when it was rediscovered. In 1980, we began a 14-year series of trials in conjunction with UC Davis, to identify Cabernet Sauvignon clones best suited to our Rutherford Bench terroir. Two clones (numbers 4 & 6) were ultimately selected for grafting to rootstocks planted in the well-draining, alluvial fan soils of our estate vineyard. As a component of our Georges de Latour and other reserve Cabernet Sauvignons, Clone 6 has notably small loose clusters and small berries that yield highly concentrated, distinctive flavors structured by muscular tannins. Often referred to as our mountain fruit on the valley floor, this creates a Cabernet that is very concentrated with more structure and tannin.