The discussion of the facinating evolution of this character created by a pioneer of the medium and how a 'down under ground' comic maker got to make some stories featuring him, is here:
https://www.youtube.com/watch?v=woVZPotqxrw
It was an honour to talk with Denis Kitchen, who like Eisner is one of the great cartoonist/publishers of the medium, and about whom a documentary is being released later this year:
https://www.youtube.com/watch?v=9g4P9-Gy_ug