3644183 Thoreau\'s Hut, Walden Woods, Concord, Massachusetts (engraving) by American School, (19th century); Private Collection; (add.info.: Thoreau\'s Hut, Walden Woods, Concord, Massachusetts. The hut built in 1845 by American writer, naturalist and philosopher Henry David Thoreau, in which he spent two years undertaking an experiment in simple living that inspired his most famous book, Walden. Illustration from Young Folks\' History of Boston by Hezekiah Butterworth (Estes and Lauriat, Boston, 1881). Digitally cleaned image.); by Look and Learn.