Here is an anomaly I call the SmokeStack Lincoln. It has the appearance of smoke coming from a duct, and traveling all the way across the field to Lincoln's sleeve. I thought it was a gas bubble, but the trail disappeared into the dome openings across it. I thought a bubble would be visible across the dome in it's entirety. Crawford has an example of this coming as well, along with the DDR Arkansas. I noted that there was little response to my offer to populate the board with your own examples of the Arkansas double. What's that gift horse's name, anyway?
