RULES OF THE SUPERIOR COURT OF THE STATE OF NEW HAMPSHIRE

    139. Any person shown to be interested may become a party to any proceeding in equity on his petition briefly setting forth his relation to the cause; or, upon petition of any party, such person may be made a party by order of court notifying him to appear therein. If the person so notified shall neglect to appear, the bill shall be taken pro confesso as against him. No such decree pro confesso shall be set aside, except by agreement, or by order of the court upon such terms as justice may require.