(1) It sounds as if in the very earliest performances (such as 22 October 1967), Jerry sings "Their breath was cold and bated" (thanks to Wil Gehne for pointing this out).
The other day they waited
The sky was dark and faded (note 1)
Solemnly they stated
He has to die
You know he has to die
And all the children learning
From books that they were burning
Every leaf was turning
To watch him die
You know he has to die
The summer sun looked down on him
His mother could but frown on him
And all the others sound on him
But it doesn't seem to matter
And when the day had ended
With rainbow colours blended
His mind remained unbended
He had to die
You know he had to die
You know he had to die