Poetry has the virtue of being able to say twice as much as prose in half the time and the drawback if you do not give it your full attention of seeming to say half as much in twice the time.
I didn't make my first solo record until 1981 so I don't have any 60's or 70's recordings but I am working on a large boxed set called DUST to be released next year the 20th anniversary of my first solo record.