Greyhawk: Guide vs. Gazetteer Discrepancies

From the chronology in A Guide to the World of Greyhawk (1983 Boxed set).  Years are Oerid (O.R.):

187 Oerid migrations east of peak point.
223 Invoked Devastation of Rain of Colorless Fire strike

Compared to the original Gazetteer (1980 Folio edition):

187 Oerid migrations east at peak point.
223 Invoked devastation and Rain of Colorless Fire strike.

These kinds of printing errors are great fun for historians trying to discern past events from copied texts, but anyone who reads "A Brief History of Eastern Oerik," which accompanies the timeline in both editions, will quickly learn that the Invoked D. and the Rain of C. were separate cataclysms, not a single, verbose event.

However, the item regarding Oerid migrations is a bit more of a conundrum.  While the terminology in the old Gaz is a bit ambiguous--it could mean that the volume of eastward migration of the Oerid was at its peak or it could also mean that peak point was a place that the migrants had reached--replacing "at" with "of", as some well-meaning but unknowing typesetter did for the Guide, makes the statement unambiguous: a literal translation of the Guide, as printed, insists that "peak point" be a place which Oeridian refugees were stumbling past sometime in the year 187 O.R.

That said, have any Greyhawkers who grew up on the Guide ever pondered where on the map this fabled Peak Point might be located? 

Where's Peak Point on this thing?