During that period any person shall be at liberty, in such manner as the High Court Division by general or special order from time to time directs, to show cause why the said decree should not be made absolute by reason of the same having been obtained by collusion or by reason of material facts not being brought before the Court.On cause being so shown, the Court shall deal with the case by making the decree absolute, or by reversing the decree nisi, or by requiring further inquiry, or otherwise as justice may demand.The High Court Division may order the costs of counsel and witnesses, and otherwise arising from such cause being shown, to be paid by the parties or such one or more of them as it thinks fit, including a wife if she have separate property.Whenever a decree nisi has been made, and the petitioner fails, within a reasonable time, to move to have such decree made absolute, the High Court Division may dismiss the suit.