From the map of the "land" of the "Great Kingdom" and environs -- the territory of the C&C Society -- Dave located a nice bog wherein to nest the weird enclave of "Blackmoor," a spot between the "Giant Kingdom" and the fearsome "Egg of Coot."Clearly, "Giant Kingdom" is an error, since I was sure it must have originally read "Great Kingdom." So I figured that the error must have been an artifact of WotC's reproduction process, perhaps the use of OCR software or something. But, when I looked at my TSR copy of Holmes, I found the exact same phrase, "Giant Kingdom." This sent me running to my copy of Volume 1 of OD&D, since I was now starting to wonder whether it, too, referenced this mysterious "Giant Kingdom." If so, it meant I'd somehow not noticed it all these years and it made me wonder just what this "Giant Kingdom" was.
Alas, the original foreword has the phrase "Great Kingdom" in place of "Giant Kingdom," as I'd suspected. This disappoints me a little, since, if "Giant Kingdom" had been there, it would have suggested a hitherto unknown aspect of Dave Arneson's Blackmoor campaign. Still, it's an interesting error and the fact that it's unique to Holmes makes me wonder how it happened.