Here's one site
http://www.filestube.com/a/acappella+spirituals

This is the part that is part of the old spiritual:

Are you ready my brother
Are you ready for the journey
Do you wanna see my Jesus
I'm waiting for the chariot
'Cause I'm ready to go

I just don't have Befo' de War Spirituals, p. 53. There are several other fragments and reference saying it was very popular in the early 1900's.

It's possible the song infulenced the famous rock song: Are you Ready?

Are you ready, not to be alone?
Someone's coming to take you home
And if you're ready, then He'll carry you home

Richie