Who was the author of Cambridge Agreement 1629?

There is no known historical document or agreement called the "Cambridge Agreement 1629." It's possible you might be misremembering the name or date of a different agreement.

Could you please provide more context or details about what you are looking for? Perhaps you can recall:

* The subject matter: Was it about religion, trade, politics, or something else?

* The parties involved: Who were the people or groups involved in the agreement?

* Other relevant information: Any other details you remember about the agreement.

With more information, I might be able to assist you in finding the document you're looking for.