This section is from the book "Popular Law Library Vol7 Equity Jurisprudence, Trusts, Equity Pleading", by Albert H. Putney. Also available from Amazon: Popular Law-Dictionary.
A defendant may plead to one part of a bill and answer the rest. In addition wherever the defendant files a plea, and the complainant's bill contains interrogatories relative to the matters put in issue by the plea, the defendant must support his plea with an answer to such interrogatories. This can only happen in the case of negative and anomalous pleas.