The above hand was played by my great grandfather, Baron Wynsten von Munchausen. The six heart bid was an example of the von Munchausen convention showing at least 28 HCP. The Baron used this convention on many occasions. West's double was lead directing, indicating a lead of dummy's first bid suit. Dummy had not bid a suit, but West was on lead anyway so it made no difference, he explained later. The Baron re-doubled because he had extra values (29 HCP). He always had extra values, and always re-doubled. West led the four of hearts.
Von Munchausen had a nearly super-human table presence and played each hand as if he could see through the backs of the cards, or perhaps, as if the backs of the cards had special markings that allowed him to do so. In any case, how did he make six hearts re-doubled?