Section 39. An order under any of the hereinbefore contained provisions, for the appointment of a new Trustee or

39. An order under any of the hereinbefore contained provisions, for the appointment of a new Trustee or new Trustees, or concerning any immovable property, stock or Government securities, or thing in action subject to a trust, may be made upon the application of any person beneficially interested in such immovable property, stock, Government securities, or thing in action, whether under disability or not, or upon the application of any person duly appointed as a Trustee thereof; and an order order under any of the provisions hereinbefore contained, concerning any immovable property, stock, Government securities, or thing in action subject to a mortgage, may be made on the application of any person beneficially interested in the equity of redemption, whether under disability or not, or of any person interested in the monies secured by such mortgage.