EVALUATING LEAD ISOTOPE DATA: COMMENTS ON E. V. SAYRE, K. A. YENER, E. C. JOEL AND I. L. BARNES, ‘sTATISTICAL EVALUATION OF THE PRESENTLY ACCUMULATED LEAD ISOTOPE DATA FROM ANATOLIA AND SURROUNDING REGIONS’, ARCHAEOMETRY, 34 (1) (1992), 73-105, AND REPLY