This is fast becoming a classic Mudcat thread! However, how does the following info fit in?

[1969:] [Staines Morris is the] result of a co-operative effort by Cyril Tawney, the Yetties, Frankie Armstrong and myself. The tune is obviously for a very formal dance, and has echoes of Michael Praetorius and before. (Notes Martin Carthy, 'Prince Heathen')

Am I right in assuming that a set of lyrics was published in 1656, but not necessarily the one we now know as Staines Morris? Is one the basis of the other? Or was Martin Carthy suffering from a lapse of memory?