Persons under legal disability 10. Persons under legal disability may sue by their guardians or defend by guardians appointed for that purpose. Next friend 11. Before the name of a person is used in any action as next friend of an infant or other party, or as relator, that person shall sign a written authority for that purpose, and the authority shall be filed in the Registry. Numerous persons 12. (1) Where there are numerous persons having the same interest in one suit, one or more of such persons may sue or be sued on behalf of or for the benefit of all persons so interested. (2) Where there are numerous persons having the same interest in one suit and they seek to defend the action, a judge may allow one or more of such persons to defend the action on behalf or for the benefit of all persons so interested. Where there is no personal representative 13. (1) If in any proceeding it appears to a Judge that any deceased person who was interested in the proceedings has no legal personal representative, the Judge may proceed in the absence of any person representing the estate of the deceased person, or may appoint some person to represent his estate for the purpose of the proceeding on such notice to such persons (if any) as the Judge shall deem fit either specifically or generally by public advertisement and the order so made and any order consequent thereon shall bind the estate of the deceased person in the same manner in every respect as if a duly constituted legal personal representative of the deceased had been a party to the proceedings. (2) Where a sole or sole surviving plaintiff or defendant in a proceeding dies and the cause of action survives but the person entitled to proceed fails to proceed, a Judge may on the application of either the deceased person's legal practitioner or the opposing party order any person to take the place of the deceased and proceed with the suit. (3) In default of such application or where the person substituted fails to proceed, Judgment may be entered for the defendant or as the case may be for the person against whom the proceedings might have been constituted. Proceedings not defeated by misjoinder or non-joinder. 14. (1) No proceeding shall be defeated by reason of misjoinder or non-joinder of parties, and a judge may deal with the matter controversy so far as regards the rights and interest of the parties actually before him.