There is another Gin Cosmopolitan from "Pioneers of Mixing Gin at Elite Bars
1903-1933," by American Traveling Mixologists, 1934
Cosmopolitan
* Jigger Gordons Gin
* 2 Dashes Cointreau
* Juice of one Lemon
* Teaspoon Raspberry
Glass No. 4 Shake and strain
The version you have seems to be a variant of the above drink, which was
listed in the Daisies section of the book.
Daisies are basically Sours with added redness, and a few dashes of orange
liqueur (depending on the type of Daisy, of which there are two distinct
types); That pretty much sounds like a Cosmopolitan (cranberry for added
redness, etc).
Hope this helps, I will look into this guy you name as being the creator, but
unless it was before 1934 then it is unlikely to be them.
Cheers!
George
http://www.thinkingbartender.com/http://www.thinkingbartender.com/bartenderthinking/