How did that page of X-Men#141 end up without any lettering on the board?
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The issue was late, so the lettering was done on overlay, in order that Terry could ink it without having to wait for lettered pages.
This was a fairly common practise in those days. It was a way of ensuring that even when portions of the job fell off-schedule -- in this case, the scripting -- the books would still ship on time.
I should just dig the book out -- I can't remember the title. It was a thick soft cover that had every comic artist profile you could imagine and a number of examples of their work (in B&W). JB wrote one of the intros for the book -- "How I Do What I Do" -- or something like that. Jack Kirby might have written the other intro? The book has Spawn on the cover. It's a cool little book. About the size of a comic -- but MUCH thicker. It was well over a hundred pages.