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Gibson's principal statement of the Petra-as-original-Mecca hypothesis: the early-mosque qibla survey, the absence of Mecca from Ptolemy, the irregular Ka'ba measurements, the Nabataean-Aramaic substrate of Qur'anic Arabic, and the name-migration reconstruction. Includes statistical work by Schumm and Goldstein and historical chapters by Doell. Distributed as a free PDF.