5. The parties to the reference, and all persons claiming through them respectively, shall, subject to any legal objection, submit to be examined by the arbitrators or umpire, on oath or affirmation, in relation to the matters in dispute, and shall, subject as aforesaid, produce before the arbitrators or umpire, all books, deeds, papers, accounts, writings and documents within their possession or power respectively which during the proceedings on the reference the arbitrators or umpire may require.