What is his earliest post-accident recording/work?

What are the earliest existing recordings of him after his 1966 motorcycle accident? Having recently listened to and fallen in love with the John Wesley Hardin album and about to check out the Basement Tapes for the first time, I'm intensely curious about what he was doing in late 1966 while recuperating. I know he worked on the unreleased documentary as soon as he was able to, but is there any recordings of him from late 1966 after the accident but before the Basement Tapes/JWH sessions?