Since the Bauldwin men are from that area, I was thinking perhaps your man knew them and knew the spelling of that name. It was just a guess. I was outside when I realized you never said the man you are referring to was name Baldwin. No it wasn't lightening!!! LOL LOL LOL
Looking at the history of the place, it appears the name was always Bald---, but i did locate something of related interest-----http://www.jlkstamps.com/covers/miss/ms511.htm
Scroll down to CSA 4.