“20. It is true that a suit or an original proceeding is to be tried in all its stages on the cause of action as it existed on the date of its commencement. The only exception to this rule is that a Court may take notice of events, which have happened since the institution of the suit or the original proceeding and grant relief to the parties on the basis of the altered conditions, (sic which) is applied in cases where it is shown that the original relief claimed has, by reason of subsequent change of circumstances, become inappropriate or that it is necessary to base the decision of the Court on the altered circumstances in order to shorten litigation or to do complete justice between the parties. (See Rai Chand Mandal Vs. Biswanath Mandal, AIR p.104). This was the view expressed by Sir Ashutosh Mookerjee, J. (as His Lordship then was) on this question when subsequent developments should be taken into consideration by the Court during the pendency of a proceeding or of a suit or even at the appellate stage.