(Janáček: The Makropulos Case). Ten. Descendant of Ellian MacGregor, a Scottish singer who had an affair with the Czech Baron Prus and had a son, Ferdinand MacGregor. When the Baron died intestate, his estate went to his cousin. The Gregor family contested the will and the case between them and the Prus family has been going on for 100 years, now involving Albert Gregor and Jaroslav Prus. The opera singer Emilia Marty confirms the history of the Gregors and is also able to tell the lawyer where to find the will of Baron Prus which will confirm Gregor's right to the estate. Created (1926) by Emil Olšovský.