N.H. Rev. Stat. Ann. § 534:19

A justice of the court to whom any such writ is returned may certify and return it, with all things pertaining thereto, to the court, if then sitting; and, at any time before the prisoner is discharged, bailed or remanded, he may adjourn further proceedings on the writ to the court, if then in session, or to the next term thereof if to begin within three months next afterward. The court, in any such case, shall proceed therein as if the writ had been, by the tenor thereof, returnable thereto.