The wetlands of the San Juan Basin in Central Veracruz, Mexico, were a favored place for their ancient inhabitants. Around the fifth century A.D., Prehispanic people built an extensive network of canals and raised fields along the margins of lakes and rivers that allowed for almost year-round intensive agriculture. Alfred Siemens' discovery of the remaining traces of this ancient agricultural system in the 1970s led him to uncover fifteen centuries of land-use history in the region.

This book contains a full record of his findings.

Siemens' research contributes to knowledge in several fields. It adds a significant environmental dimension to our understanding of the Mesoamerican-European encounter in the sixteenth and succeeding centuries. And it offers a model of an ancient agricultural system that could still be used to aid in the subsistence of marginalized rural people in many tropical lowland areas.

Amplified with original air oblique photography, maps, and tables, and enriched with data from both archaeology and colonial archives, this book is an authoritative historical geography of a wetland landscape. Or, in the author's more modest words, "In unbuttoned moments, it seems to me that what I have here is a biography of a swamp."