 The two later collaborated on fourteen comic operas that became the most enduring pieces of musical theatre from the Victorian era.Gilbert would later reuse many ideas and plot elements from these earlier works in the Gilbert and Sullivan operas.In the haunted Scottish Castle of Glen Cockaleekie, where the title deed to the castle, much like "Brigadoon", is only found once every hundred years, Sir Ebenezer Tare has decided that, as "possession is nine-tenths of the law," he might as well be in possession of the castle until such time as the deed shows up again.