Famous medieval melody "The Scarborough Fair" popular from Wales.
https://caracolparlanchin.wixsite.com/scarboroughfair
SIMON AND GARFUNKEL :
ANOTHER VERSION:
COMPOSER :TRADITIONAL
Red River Valley is a traditional cowboy song . It is believed that it was composed approximately in 1870.
Mexican folk song was composed in 1882. It is one of the best-known Mexican
songs abroad and has been performed by popular artists worldwide.
In the link , have 1 example:
http://anabel41.wix.com/cielito