An engineer saw a streetcar slide down Nob Hill, killing 5 horses, & came up with this better system
Three rail ... January 15, 1880  United Kingdom  Six people killed when the 5:
30 .... is thrown down the embankment by the collision; the train's engineer 
throws .... Washington, a street car descending Denny Hill suffers a cable 
malfunction... [DOC] [TLE] Harry Lincoln Wollenberg | Immigrant Entrepreneurship [PAR] Aug 9, 2013 ... [2] Wollenberg stepped down from active management only in 1977, at the age of 
ninety-one.