Grouping the chords into 12 bars ,it goes as follows:
(each chord symbol represents one beat, as does the forward slash)

Blake plays the first verse slightly differently from the other verses, with the second and sixth bars going F/G7/| instead of F///|

Verse:

C///|F///|C/G7/|C/C7/|

F///|F///|C/G7/|C/A7/|

D7///|G7///|C/G7/|C/G7/|

Break:

C///|F///|C/G7/|C/C7/|

F///|F///|C/G7/|C/A7/|

G7///|F///|C/G7/|C/G7/|

I have a vivid recollection of hearing this song for the first time in, I guess, 1964, my roommate had a compilation with this on it.

I couldn't believe my ears, had never heard anything like it before.