One of the sources of information for my novels is the award-winning 1993 documentary filmed by Claude Wiatrowski called “All Aboard for Eureka!” I’ve owned both the commercially-sold VHS and DVD copies of the film, and a couple of years ago, he uploaded it to YouTube for everyone to enjoy free of charge.
It’s a fine overview of Eureka Springs history, as well as the various incarnations of The North Arkansas Line, and I hope you enjoy it as well.