ISBN-13: 9780395948002 / Angielski / Miękka / 1999 / 144 str.
Thoreau developed ideas fundamental to ecology 50 years before that word was coined. He called for a science that would join man and nature--a "conscience", a moral knowledge founded on material faith. Edited by Laura Dassow Walls. Part of "The Spirit of Thoreau Series". 20-30 drawings by Thoreau.