Built in 1884 by Chinese stonemasons for the Kohler and Frohling winery, this sherry-making building was converted into a barn for Jack London's prized Shire horses.

"As the foundation of his horse stock he bought a prize Shire stallion for twenty-five hundred dollars, then bought four pedigreed Shire mares for seven hundred dollars a piece. Because he believed that big workhorses were coming back he bought up all the mares used by the drayers in San Francisco that had developed sore feet on the cobblestones. When he needed more draft horses to clear and plow his fields, and couldn't find the kind of animal he wanted, he took a buying trip to Southern California."

". . . Jack founded his purebred English Shire stable by the purchase of nothing less than Neuadd Hillside, grand champion of California, and once prize-winner in England. He weighed a ton, and was wondrously shaped withal. Cockerington Princess, champion of her own sex, also came to gladden our eyes, while the converting into stables of theretofore unused stone winery buildings went apace. . . ."