WELL. If you read the last post, you saw that Larry the wonder-researcher found a Minnesota DNR site with pictures taken from the air as early as 1940. Yes, Center Valley was pictured, altho someone drew on the photo with a grease pencil, and circled the buildings in Center Valley. But still.
Larry took the current aerial photo and faded it to the 1940 map--WAY COOL, huh??
(No, we didn't draw on the aerial map...someone did that in 1940).