The complaint alleges that the defendant, shortly after her husband’s death, requested the plaintiff, her sister, to continue to live with her pending certain litigation in regard to her husband's will and property, and that the defendant promised to pay the plaintiff, for remaining with her, superintending the household duties, and aiding her in .preparing evidence and getting ready for the trial of such litigation, and counseling and advising her in reference thereto during such period, the sum of $7,000. The answer alleges that the plaintiff lived with the defendant, but only as her guest, for some time, and not during the entire time that the litigation was pending. The court, on motion, ordered the plaintiff to serve a bill of particulars stating: First, the time and place of the alleged services; second, when and where the request for such services was made; third, what litigation was pending, the continuance of which was to determine the term of the plaintiff’s residence with the defendant; fourth, the manner and respects in which the defendant requested the plaintiff to superintend the defendant’s household duties; fifth, the manner in which the plaintiff kept house for the defendant; sixth, when, where, and what demand of payment was made; seventh, the manner and particulars in which the plaintiff advised the defendant in preparing for the trial over the husband’s will; eighth, what evidence the plaintiff prepared; and, ninth, what was the subject of the plaintiff’s counsel- and advice. In a matter -resting so largely in the discretion of the special term, we are disinclined to review its decision, but a reference to well-established principles will assist us in arriving at a conclusion. A bill of particulars is intended to amplify more specifically matters set up in a pleading, not to set up a cause of action, as the latter is the function of the complaint. It is intended to prevent surprise at the trial, by furnishing such information as a reasonable man would require when called upon to defend himself, and by limiting the general allegations of the pleading so as to confine *874the proof to the particulars specified. It is not designed to compel a party to furnish the specific evidence upon which he relies for recovery. Nor can a party be compelled to particularize facts already known to his adversary, or which are equally accessible to both parties. But this last qualification is not to be construed to apply to a case where the issue to be tried is the existence of certain facts which form the basis of the cause of action; otherwise it would be unreasonable to order a bill of particulars in an action based on adultery, of which class of cases Tilton v. Beecher, 59 N. Y. 176, is a good example. ' The court (Rapallo, J., writing) said (page 190):
“It is further urged that the defendant in such a case needs no specification of particulars, because he knows better than any other, but one, the details about which he seeks information. This is' petitio principii. It assumes that the defendant has committed the acts with which he is charged, while the very question to be tried is whether or not he has committed them.”
With these general principles in view, it is not difficult to decide that in some respects the order granting the bill of particulars was too sweeping. We think that so much of the order as is referred to in the fourth, fifth, and eighth divisions above made is objectionable, being within the rule as to furnishing specific evidence. As to the sixth division, relative to a demand for payment, it would seem quite clear that, as no proof of that fact is necessary, there is no need for particulars.
The order granting the bill of particulars must be modified by striking out the clauses referred to, and, as thus modified, affirmed, without costs to either party. The order denying the motion to resettle the first order must also be affirmed, with $10 costs and disbursements. All concur.