Stephen T. Jackson is professor emeritus of botany and ecology at the University of Wyoming and the editor of von Humboldt's Essay on the Geography of Plants. He lives in Tucson, AZ. Laura Dassow Walls is the William P. and Hazel B. White Professor of English at the University of Notre Dame and the author of several books, including The Passage to Cosmos: Alexander von Humboldt and the Shaping of America. She lives in Granger, IN. Mark W. Person is associate academic professional lecturer in German in the Department of Modern and Classical Languages and director of the language lab at the University of Wyoming. He lives in Laramie, WY.

Stephen T. Jackson is professor emeritus of botany and ecology at the University of Wyoming and the editor of von Humboldt's Essay on the Geography of Plants. He lives in Tucson, AZ. Laura Dassow Walls is the William P. and Hazel B. White Professor of English at the University of Notre Dame and the author of several books, including The Passage to Cosmos: Alexander von Humboldt and the Shaping of America. She lives in Granger, IN. Mark W. Person is associate academic professional lecturer in German in the Department of Modern and Classical Languages and director of the language lab at the University of Wyoming. He lives in Laramie, WY.

Stephen T. Jackson is professor emeritus of botany and ecology at the University of Wyoming and the editor of von Humboldt's Essay on the Geography of Plants. He lives in Tucson, AZ. Laura Dassow Walls is the William P. and Hazel B. White Professor of English at the University of Notre Dame and the author of several books, including The Passage to Cosmos: Alexander von Humboldt and the Shaping of America. She lives in Granger, IN. Mark W. Person is associate academic professional lecturer in German in the Department of Modern and Classical Languages and director of the language lab at the University of Wyoming. He lives in Laramie, WY.