In 1962, the Universidad del Cuyo published a story, citing the Peruvian newspaper El Comercio de Iquique, which indicated that Elliott Stubb created the "whisky sour" in Iquique in 1872. (El Comercio de Iquique was published by Modesto Molina between 1874 and 1879.
It is freakin' delicious !!!!
As a side note, if you have maple syrup, try to use that instead of simple syrup. It makes the cocktail soo much better
2 ounces bourbon or rye whiskey
1/2 ounce simple syrup
1 ounce fresh lemon juice
1 egg white