www.paul-simon.info 
The neck of my Guitar
Linda RonstadtYear: 1986
Under African Skies
Graceland

This song is a really nice duet, Paul wrote the lyrics about Linda (who is from Tuscon Arizona) and about Joseph (Shabalala) from Africa. This is what Linda Ronstadt said: "When Paul Simon asked me for something from my childhood that visually symbolized the part of the country I grew up in, without even thinking I immediately said the San Xavier [del Bac] Mission, so he put it in a song ["Under African Skies"] that I sang with him as a duet on his Graceland album." "Tucson also has the most beautiful light in the world. Even at night it's amazing. There are two places on the planet that have the lowest amount of ambient light at night where the sky is very, very dark and the stars are plainly visible - a place in Africa and Tucson. "