Margarita Sames 

Under History/Origin, the section on Margaret Sames has a number of incorrect statements. First, her name is Margarita, not Margaret. Second, her recipe is 3 parts white tequila, i part Cointreau, and i part fresh lime juice. Third, she specifies ordinary table salt, not coarse salt. She also says that most people over-salt the glass.
This information comes from an article by Susan A. Merkner of the New York Times, in which Merkner interviewed Margarita Sames. Sames was 81 years old at the time, and living in San Antonio. I have a copy of the article, but not the date, which I'm guessing was from the mid to late 1990's. If you can locate this article, you will have the much-needed authentication for Margarita Sames.  69.85.145.142