When a mystery letter was delivered to a Michigan post office in 2015, its postmark suggested that it was recent. Yet what postmaster Lori Boes held in her hands was actually an exciting piece of 150-year-old history. But who had sent the correspondence? And why had it appeared a century and a half after it had been composed?
In April 2015 Lori Boes, who works as a postmaster in Michigan, was handed a mysterious letter. The handwriting offered her a mental image of who the author might have been, but otherwise nothing about the delivery struck her as particularly notable or outstanding.