This vintage snapshot is from Bill and Dick's Excellent Adventure. Bill is on the left...or Dick...I'm not sure. I do know, because of the May 25th diary entry, the fellow driving is Mr. Nelson the "Chief of Factory Inspection for State of Illinois."
Click on either image to see it larger.
As to the model of car, haven't a clue.
I've featured photos and diary entries from Bill and Dick's adventure before, including here, and I'm sure they'll be featured in the future.