The Brief A San Francisco couple doing yard work at their two-story Russian Hill neighborhood uncovered a 150-pound stone sculpture buried nearly 2 feet underground in their backyard. A San Francisco couple doing yard work at their two-story Russian Hill neighborhood home recently uncovered what may be a piece of the city’s artistic past: a 150-pound stone sculpture buried nearly 2 feet underground in their Russian Hill backyard. "To get that smooth transition in carving a stone, any kind of stone, is really a masterful piece of work," she said. One name surfaced repeatedly: Ralph Stackpole, a prominent San Francisco sculptor and teacher in the early and mid-20th century. "One of them said, ‘That looks like a Stackpole,’" Gittelsohn said.