<P> In 1847 - 48, he toured the British Isles . He also visited Paris between the French Revolution of 1848 and the bloody June Days . When he arrived, he saw the stumps of trees that had been cut down to form barricades in the February riots . On May 21, he stood on the Champ de Mars in the midst of mass celebrations for concord, peace and labor . He wrote in his journal, "At the end of the year we shall take account, & see if the Revolution was worth the trees ." The trip left an important imprint on Emerson's later work . His 1856 book English Traits is based largely on observations recorded in his travel journals and notebooks . Emerson later came to see the American Civil War as a "revolution" that shared common ground with the European revolutions of 1848 . </P> <P> In a speech in Concord, Massachusetts on May 3, 1851, Emerson denounced the Fugitive Slave Act: </P> <P> The act of Congress is a law which every one of you will break on the earliest occasion--a law which no man can obey, or abet the obeying, without loss of self - respect and forfeiture of the name of gentleman . </P> <P> That summer, he wrote in his diary: </P>

What two authors are most known for promoting transcendentalism