I didn't realise no one had answered this query when I searched for the answer just the other day.

Then I found the words in an old copy of Sing! as I predicted in my original posting. Here they are:

Know this my brethren: Heaven is clear and all the clouds are gone.
The righteus man shall flourish now, good days are coming on.
So come my brethren and be glad and eke rejoice with me:
Lawn sleeves and rochets shall go down and hey then up go we!

If once the anti-Christian crew be crushed and overthrown,
We'll teach the nobles how to stoop, and keep the gentry down.
There's neither Cross nor Crucifix shall stand for men too see:
We'll make a pulpit of a cask and hey then up go we!

The name of lord shall be abhorred for every man's a brother,
No reason why in Church or State one man should rule another.
And wheb the change of government shall set our fingers free:
Lawn sleeves and rochets shall go down and hey then up go we!

Good fundamentalist, God-oriented, revolutionary Puritanism, set to a Morris dance tune! That tells you all the libels about the glumness of puritans were untrue. In fact, when the Roundheads conquered Cambridge (I think it was) the scholars at the university complained the Puritans kept them awake all night with the noise of fiddles playing!