Mailed in 1975, the stamp and faint postmark are there.  One traveler’s account of his visit reads:  “Mitre Peak’s summit sits over a vertical mile directly above Milford Sound – 1,692 metres (5,551 feet) above sea level. It’s a hugely demanding climb and one that should not be taken lightly. The track through the thick Fiordland bush is unmarked, the route above the bushline is hugely exposed and it’s a demanding mission regardless of how you tackle it.”  Forewarned is forearmed.  Grade: 1