I grew up in the 1930s at Hermann and Fillmore. A few blocks away at Hermann and Laguna was a large hill that is now the site of the Mint. But in those days at the top of the hill were the ruins of a Spring Valley Water Company building. It was brick with a maze of shattered rooms. We called it "The Fort." and played cops and robbers. Facing Duboce Street the hill sloped downward and was covered with wild grass. We used to take large pieces of cardboard, sit on them and coast down the hill at high speed. The only problem was we had no way of stopping and sometimes we coasted onto the street. There were very few autos in those days but the N car line was a hazard. There was another problem on the hill. It was covered with Poison Oak and once "heeding the call of nature" I got the worst case of poison oak on a part of my body I will leave you to guess. Bill