January 19th, 2015

Copyright for Old Blues Songs

In a piece I've been writing, I quote from several blues songs, including "Death Letter".  These are songs that go back to the turn of the century.  Does anyone know what copyright issues might be?  I've searched the Internet on the issue, but I only get answers to "how do I copyright my songs" and related answers.

I'm sure the recordings from say, Son House are copyrighted, but are the songs themselves?  Thank you!