Among individuals, it is no unfair discrimination to express especial thanks to Mr.A.A.Robinson and Mr.A.L.Van Antwerp.
President Diaz has ever shown a friendly interest in my plans of work and the results obtained.

Senor Manuel Fernandez Leal, Minister of the Department of Fomento, more than any other official, lent us every aid and assistance in his power; his successor, Senor Leandro Fernandez, continued the kindness shown by Minister Leal.

And to all the governors of the states and to the _jefes_ of the districts we are under many obligations, and express to each and all our appreciation of their kind assistance.

Those personal friends who have been helpful in this specific work in Indian Mexico are mentioned in the appropriate places in the text.

To those companions and assistants who accompanied us upon the journeys a large part of the results of this work are due.
CHICAGO, January, 1908.
CONTENTS CHAPTER Page I.PRIESTLY ARCHAEOLOGY 1 II.