"Walls were ordered razed by the authorities." The dangerous
demolition work involved pulling down teetering brick walls with
cables winched by donkey engines. The location of this ruin has
resisted identification. Note the water heater tower [?] at the
start of the sequence.
camera pans past ruins to a wall about to be demolished. The slope
behind the ruins may be Nob Hill, which would place this scene on a
street to the south and west. The demolition of the wall and tall
facade framing is seen.