As a snot nosed kid, I first collected coins, then added stamp collecting, and eventually added baseball card collecting (kid style, not what we now do). I still look at stamps once in a while, and covers (envelopes). I once got an early US Airmail cover that was also sent as Special Delivery. For stamp collectors, it had a C5 airmail stamp, and a special delivery stamp, and lots of backstamp cancellations showing the cover's progress.
With all that said, I saw this air mail Registered cover on eBay several weeks ago.
https://www.net54baseball.com/attach...1&d=1679794853
https://www.net54baseball.com/attach...1&d=1679794922
In the eBay listing, neither W. C. Matthews, nor the Chicago Cubs, was mentioned. But I could see that whoever Matthews was, he was in the front office for the Chicago Cubs. Obviously, I won the cover, just under $10. So now I'm curious about who was W. C. Matthews.
He was the GM for the Cubs, I read... he was the GM that had a big trade to get Ralph Kiner away from the Pirates. And he played baseball in his younger days. Great... Can I find a picture of him? Can I find one of his cards? Yes, and Yes.
https://www.net54baseball.com/attach...1&d=1679794954
https://www.net54baseball.com/attach...1&d=1679794976
https://www.net54baseball.com/attach...1&d=1679794995