click the photo to enlarge it My most recent email reply from Dan Brown, just a few moments ago ,has given us a look at what the closest thing to an airport from the co-ordinates I supplied for the area.Here is a copy of the email reply
Hi Les,
I have done a search for Lasalle Airport based on the map and coordinates you gave me. I have attached a list of photos that cover the area where the airport should be. I have attached a sample scan of one of the photos from 1930. The only evidence of an airport are the small white airplanes parked in the field. There doesn't look like there is a runway of any sort (although, a flat grassy field often works). Let me know if you're interested in any of the photos.
Regards,
Dan