Major reforms enacted in New York in the late 1840s and in England in the early 1850s laid the foundation for the rise of modern discovery by imposing a clear separation between pleadings and discovery as distinct phases of procedural law. Discovery devices could now be invoked independently of the pleadings. The New York reforms went much farther, by directly merging common law and equity procedure (which would also happen in England in the early 1870s), and by expressly authorizing pretrial oral examinations of both opposing parties and third-party witnesses, the basis of the modern deposition. (Up to that point, discovery from able-bodied opposing parties was still limited to interrogatories.) In fact, the New York code of civil procedure (brought about by David Dudley Field II) went so far as to abolish written interrogatories. A major flaw, though, of the New York code of civil procedure was that it only allowed parties to seek discovery on issues on which they would have the burden of proof at trial. This caused lawyers for defendants to plead fictional defenses in answers, because they still could not directly pursue discovery into the plaintiff's claims.