Finally found a used copy of Harpo’s autobiography. A fun romp through early, poverty-stricken but full of get up and go New York Marx family childhood stories (Harpo was born in 1888!). Followed by years and years of pounding the pavement scratching out a living on the Vaudeville circuit. Finally a few breaks and steady theater success, and then Hollywood and the big time.
Here he details the birth of his trademark squeeze horn ( taxi horn). The show ‘Home Again’ puts this at around 1914.