Letter to Warner Brothers: A Night in Casablanca :
" It seems that in 1471, Ferdinand Balboa Warner, your great-great-grandfather, while looking for a shortcut to the city of Burbank, had stumbled on the shores of Africa and, raising his alpenstock (which he later turned in for a hundred shares of common), named it Casablanca.
I just don't understand your attitude. Even if you plan on releasing your picture, I am sure that the average movie fan could learn in time to distinguish between Ingrid Bergman and Harpo. I don't know whether I could, but I certainly would like to try."