As I understand it, the Canadian publisher of some of Sydney Carter's work denied DT access to them. I'll bet you can find the words with a forum search, tho, and hang on to those older downloaded versions of DT, as some stuff is still there, tho removed from newer versions.
The songs did vanish during the time the Harry Fox agency was threatening us, so possibly they represent the publisher. I'll bet Sydney Carter would be okay with our use of them.
Blessings,
Barbara