 On 15 May 1889 a demonstration train comprising two carriages and two locomotives ran along the newly completed line from Chesham to Rickmansworth , carrying the subscribers who had funded the extension and representatives of the local authorities and School Boards covering the areas through which the new line ran . ( As no Metropolitan Railway train had yet run through to Chesham on the finished line , the train from Chesham to Rickmansworth was drawn by two locomotives belonging to the contractors who had built the line , rather than by MR engines . A third engine ran ahead of the demonstration train to act as a pilot . ) A second train carried the directors of the Metropolitan Railway from London to Rickmansworth , collected those passengers who had ridden the demonstration train from Chesham to Rickmansworth , and continued to Chesham . 
