No printer's error at all, Jim. It just happens to be the most redacted publication out of all of those listed, all redacted to some degree. Some would argue that Percy is the worst culprit but that's only an opinion. Child himself slated Buchan on numerous occasions. That doesn't detract from the fact that it was one of the seminal works. The main point here is we have little evidence of the extent of the interference from judicious editing to outright forgery but we know they all dabbled to some extent as most of them admitted it.