Publishing Dilemma

Here's a quandary that I don't come across too often. I am reprinting classic Australian comic strips (as most of the Readership will know). In the last few days I have been working on a Second Volume of John Dixon's Air Hawk. What do I do when there is a spelling mistake in the original artwork's text? See the illustration to the left below. John has clearly written "WAGGON" in the text prior to the strip heading to the newspapers, and just as clearly a line has been placed through it. (I am not sure what was actually reprinted in the newspapers, as I am working from proofs from the artwork as the newspaper editors would have received them.) Do I correct the spelling of the word (and thus in effect censor the original)? Or should I clean up the copy (as you can see on the right) and leave it as John intended, irrespective that there is still a spelling error contained therein? Or should I clean it up and spell it correctly?

I am already presently editing out the dates and office records on the margins of the strips, which is I suppose in essence a form of censorship. Or is it? It is material that wasn't seen on the original reproduction in the newspapers. I clearly know I have an opinion (which I shall follow in the publication), but I am still interested in your thoughts.... 

Copyright John Dixon, who got me into this dilemma in the first place by not spelling right! Used with permission.