Damages — Measure of Damages — Damages for Loss of Profits — Distinction between Expropriation and Unlawful Deprivation of Property — Measure of Damages in Consequence of an Unlawful Act — Cumulative Damage of Interdependent Undertakings — Whether the Court can Rely on the Data Supplied by the Parties — Changes in the Value of the Property Taken Away — Offers of Compensation Made during Abortive Negotiations — Appointment of Experts — Indeterminate and Contingent Damages.