"Mike Sadler" were the first words that I took note of, and I continued on to the business of removing others. As I filtered through the remaining new emails a bit more carefully, I realized that I had seen the name of the sender, not the subject line of the email. I opened it quickly and there it was, a reply from Major Mike Sadler himself!
I have yet to reply, but Sadler offered to take a call at my convenience, and apologized for the lack of correspondence, along with the fact that his memory has faded with the 70 years that have passed. The first thing I think I will tell him is that he, of all people, rate privacy and a certain degree of lapse in memory. He has no doubt forgotten more than I will ever know about the subject of navigation.