Hi Barbara. No, that's definitely James. I took the track from the the "Father and Son" album and I can easily recognize James' voice. After I made the MP3 I kicked myself for not using the older Rowan track (which I also have), the singing is better on the track with Rowan (okay, so was the guitar playing) and you've also got the Blue Grass Boys behind it. The "Father and Son" album was made using James' Midnight Ramblers band. It was a good band---Vernon Derick was with him then---but it wasn't the Blue Grass Boys.
Ricky Scaggs includes "Walls Of Time" on his "Ancient Tones" CD. Needless to say, that's a nice track too. The liner notes give Rowan credit as well as Bill.
I always thought that tune, "Walls of Time" came pretty close to being the archetypical bluegrass number. You can just feel the wind coming down off the mountains and see the pine trees and the head stone with both names already carved. It just puts you right there in the scene.