"Oh now I want to go
down to the Alamo

Down where my Grandpa bit..."

That's all there is in "Rio Grande"

I can't find the lyrics for this verse anywhere which leads me to believe that it was scripted to fit the movie scene and stopped as
Maureen O'Hara walks in. ...only 2 full verses in the movie which depicted a Cavalry post in the post Civil War West Circa 1870-1875.

The song was written by Dale Evans. Taco stands didn't exist in the 1800's or at least they weren't called taco stands back then... Probably called a "Cantina", up here in the states a "Bar and Grill".

here is Rosalie Allen's version ...for me too much yodeling and too many musical riffs.

but to each his own...

http://www.youtube.com/watch?v=xss1T7xxp4o

Jake